I've made a few basic mods as tests. Nothing more than vehicle retextures and replacements... But I'm pretty proud of them as they're my first contribution to the modding community.
I have a few people to thank for guiding me through the process to create these mods.
mazexz and The Beldam.
I'd upload the two practice mods here, but I haven't figured out how to that either yet.
Anyway, now that I've had my first taste of modding... I've got quite an ambitious idea for a mod that I'd like to create.
I can get started with custom vehicles, vehicle textures and drivers, but I'd appreciate any and all help with teaching me how to do the rest of the modding needed to make this mod possible (or if people want to collab with me in making this mod, I'd appreciate that too).
So now onto the detailed description of what I hope to accomplish.
Level 1:
Map Details:
Location - Suburbs
TOD - Morning/Daytime
Interiors - Simpsons Living Room/Kwik-E-Mart/School Hallway/Homer's Workstation
Notable Changes - Frink's House next to the Cemetery/Small UFO above the School
Clothing Stores - Kwik-E-Mart/School Hallway/Homer's Workstation
Player:
Character - Homer Simpson
Personal Vehicle - Family Sedan (w/roof) (No Driver)
Outfits - Standard/Casual/Muumuu/The Chosen One/Dehydrated

Unlockable Vehicles:
3 Races - Ralph's SBR

Bonus Mission - Ned's Geo

Barney's Sale - Plow King (Driven by the Plow King)
Gil's Sale A - Electaurus (No Driver)
Gil's Sale B - Duff Truck (No Driver)
Tutorial:
Unchanged
1st Mission:
Start Location - Simpsons Front Lawn
Name - S-M-R-T
Opening Conversation - Unchanged
Objectives - Unchanged
Closing Conversation - Homer notices something off about "Lisa"/"Lisa" dismisses all doubt in an unconvincing manner/Homer buys it/"Lisa" informs Homer he needs to return to Marge before going to work/Homer says D'oh
2nd Mission:
Start Location - Simpsons Living Room
Name - Going Green
Opening Conversation - Homer notices that Marge is now green like Lisa/"Marge" dismisses all doubt in the same manner and voice as "Lisa"/Homer internally freaks out, then makes up a phony excuse to leave
Objectives - Leave the house/Get in your Vehicle/Escape the Black Sedans/Go to Frink's House/Follow the Black Limo
Closing Conversation - Homer thinks the Stonecutters are behind this anomaly/Homer thinks about who to ask for help... But then decides he'll think better after a beer
3rd Mission:
Start Location - Moe's House
Name - Duffless
Opening Conversation - Homer asks Moe for a beer/Moe tells Homer he has no beer left/Homer screams, then asks how he's supposed to defeat the Stonecutters/Moe tells Homer that a shipment of duff is on its way/Homer gets impatient
Objectives - Get in your Vehicle/Hit the Duff Truck and collect the Crates of Duff/Escape Moe/Destroy Barney's Sedan/Go to the Powerplant
Closing Conversation - Lenny asks Homer why he's so late/Homer dismisses Lenny while drinking the Duff/Lenny points out that he'll get fired if he's drunk at work/Homer continues to ignore Lenny while thinking of a plan
4th Mission:
Start Location - Homer's Work Station
Name - Blind Big Brother
Opening Conversation - Unchanged
Objectives - Unchanged but extended to include a second set of Generators that lead to Burns' Mansion back doors
Closing Conversation - Homer asks Burns why he would be spying on himself/Burns denies knowing about the cameras/Homer decides this is also the work of the Stonecutters/Burns calls Smithers to release the hounds
5th Mission:
Start Location - Simpsons Living Room
Name - Flowers By Irene
Opening Conversation - Kent Brockman announces strange black vans appearing throughout the town/Homer decides to follow the black van to get some answers/"Marge" tries to distract Homer by "complimenting" his paranoia
Objectives - Leave the house/Get in your Vehicle/Follow the Black Van/Destroy the Black Sedan/Follow the Black Limo
Closing Conversation - Homer notices the UFO above the School and all the green students in the playground/"Groundskeeper Willie" dismisses all doubt in the same manner and voice as "Lisa" & "Marge"/Homer finally connects the dots and realises that the culprit of all this is... Milhouse
6th Mission:
Start Location - Lard Lads
Name - D'oh-Nuts
Opening Conversation - Homer accuses Milhouse of turning everyone green/Milhouse tells him he's innocent/Homer ignores him and prepares to take justice into his own hands/Milhouse yells and runs away
Objectives - Get in your Vehicle/Destroy the Thrilhouse/Leave your Vehicle/Check the highlighted locations to find Milhouse's Hiding Spot
Closing Conversation - Milhouse cries/Homer realises his innocence, so he ponders who could be as evil as Milhouse/Milhouse tells him to rescue Professor Frink so he can help
7th Mission:
Start Location - Cemetery Gas Station
Name - The Fat and Furious
Opening Conversation - Homer asks Barney if he can borrow the Plow King/Barney agrees in a drunken haze
Objectives - Follow the Black Van/Destroy the Black Limo/Collect Professor Frink/Escape the Black Sedan/Go to Frink's House
Closing Conversation - Frink thanks Homer for rescuing him/Homer asks for help stopping the green invasion/Both of them go silent as a UFO appears above them/The screen goes dark as Homer and Frink scream
Bonus Mission:
Start Location - Flanders Front Lawn
Name - Petty Theft Homer
Opening Conversation - Unchanged
Objectives - Unchanged
Closing Conversation - Homer returns Ned's stuff, then asks about a reward/Ned prays for Homer, then offers him a ride/Homer mutters about Ned, but accepts the ride
Level 2:
Map Details:
Location - Downtown
TOD - Midday/Daytime
Interiors - Moe's/DMV/Bart's Room/Sit 'n' Rotate
Notable Changes - New interiors mentioned above/Inaccessible Flanders, Simpsons, & Blue House visible under the Matlock Expressway with only a teleport to Bart's Room
Clothing Stores - Moe's/DMV/Bart's Room/Sit 'n' Rotate
Player:
Character - Bart Simpson
Personal Vehicle - Lil Lightnin' 2.0

Outfits - Standard/Ninja/Cadet/Bartman/Genius

Unlockable Vehicles:
3 Races - Patty & Selma's Sedan

Bonus Mission - Dr. Nick's Longhorn

"Homer's" Sale - Mr. Plow (Driven by "Mr. Plow")
Gil's Sale A - Limo (No Driver)
Gil's Sale B - Bart's Monster Truck (Driven by "Bart")

1st Mission:
Start Location - Jedediah Springfield Statue
Name - Detention Deficit Disorder
Opening Conversation - Unchanged
Objectives - Unchanged, but Skinner is green with the same drone like voice the other Imposters have
Closing Conversation - Bart notices that Jimbo is green like Skinner was during the chase/Jimbo repeats the same dismissive line heard by all the Green Springfielders/Bart decides to find Homer to see he caused some kind of nuclear accident
2nd Mission:
Start Location - Hospital Parking Lot
Name - Green With Envy
Before wearing "Genius" Outfit Conversation - Bart tries to ask "Homer" about everyone being green/"Homer" repeats the same dismissive line heard by all the Green Springfielders/Bart decides he needs to "look the part" if he's going to get any info out of this imposter
Opening Conversation - Bart tries to imitate the drone like voice while asking "Homer" about everyone being green/"Homer" initially buys it/but Bart tries to dig too deep/"Homer" lets out a siren-like call/Bart knows he's in trouble
Objectives - Get in your Vehicle/Escape "Skinner"/Destroy "Frink's" Hovercar/Escape "Skinner"/Get to the Matlock Expressway
Closing Conversation - Bart decides he needs to hide until the heat's off/Martin invites him to watch him play the lute/Bart decides to just go home
3rd Mission:
Start Location - Bart's Room
Name - Weapons of Mass Delinquency
Opening Conversation - Bart tries to figure out how to fight back against the Green Imposters/Ralph makes a seemingly unrelated comment about fireworks/Bart thanks Ralph for the idea then asks him for a ride
Objectives - Unchanged, but Ralph drives Bart around in his SBR
Closing Conversation - Unchanged
4th Mission:
Start Location - Sit 'n' Rotate Restaurant
Name - Plot Device
Opening Conversation - Milhouse asks Bart what he's up to/Bart tells him his plan/Milhouse asks if he can help/Bart tells him to watch out for Green Imposters from this spot
Objectives - Leave the Sit 'n' Rotate Restaurant/Plant all the Fireworks around the area before time runs out/Get up to the Monorail Platform/Plant Fireworks in the Monorail Car/Get back to Milhouse
Closing Conversation - Bart tells Milhouse to keep watch from here in case anything goes wrong/Milhouse assures Bart he can count on him/Bart relents that he has no choice but to count on him
5th Mission:
Start Location - Stadium Entrance
Name - Slime Time
Opening Conversation - Bart wonders where he'll get a vehicle strong enough to lure the Green Imposters back to the Sit 'n' Rotate/He hopes Green Homer will sell him Mr. Plow
Objectives - Buy Mr. Plow (If not already owned)/Get in your Vehicle/Find "Jimbo" (Driving a generic SBR)/Follow "Jimbo" back to Sit 'n' Rotate/Find "Kearney" (Driving a generic SBR)/Follow "Kearney" back to Sit 'n' Rotate/Find "Dolph" (Driving a generic SBR)/Follow "Dolph" back to Sit 'n' Rotate/Get back to Milhouse
Closing Conversation - Milhouse celebrates/Bart tells him not to celebrate too early, the fireworks are about to begin
6th Mission:
Start Location - Sit 'n' Rotate Entrance
Name - Let Your Colours Burst
Opening Conversation - Bart reads a checklist ending with Milhouse getting ready to light the fireworks/Bart then declares war on the Imposters
Objectives - Get in your Vehicle (Triggers the fireworks going off around the area)/Destroy "Dolph's" SBR/Destroy "Kearney's" SBR/Destroy "Jimbo's" SBR
Closing Conversation - Bart and Milhouse celebrate/Bart then decides he needs to take down Imposter Skinner
7th Mission:
Start Location - Bart's Room
Name - Greenlit
Opening Conversation - Bart prepares himself for the battle with Imposter Skinner/Ralph makes a seemingly unrelated comment about his dad's evidence locker/Bart realises he should gather some evidence about these Green Imposters
Objectives - Leave the house/Get in your Vehicle/Find "Skinner"/Hit "Skinner's" Sedan and collect the evidence/Escape "Skinner"/Get to the DMV/Destroy "Skinner's" Sedan/Get back to Bart's Room
Closing Conversation - Bart breaths a sigh of relief until he sees that Ralph is green now/Bart screams in fear as the screen turns black
Bonus Mission:
Start Location - Screaming Monkey Research Centre
Name - Monkey See Monkey D'oh (Mr. Plow not required)
Opening Conversation - Mostly Unchanged, but Bart is asking Dr. Nick for a ride, instead of a Blender
Objectives - Unchanged
Closing Conversation - Mostly Unchanged, but Bart is asking Dr. Nick for a ride, instead of a Blender
Level 3:
Map Details:
Location - Boardwalk
TOD - Evening/Noon
Interiors - Android's Dungeon/Bowl-O-Rama/Observatory/Simpsons Kitchen
Notable Changes - The Bowl-O-Rama interior/Inaccessible rear view of the Flanders, Simpsons, & Blue House visible just out of bounds with only a teleport to the Simpsons Kitchen (The kitchen window is open on the exterior and interior view)
Clothing Stores - Android's Dungeon/Bowl-O-Rama/Observatory/Simpsons Kitchen
Player:
Character - Carl Carlson
Personal Vehicle - Lenny's Canyanaro (Driven by Lenny)

Outfits - Standard/Work Shirt

Unlockable Vehicles:
3 Races - Honor Roller (Driven by Martin)
Bonus Mission - Wiggum's Police Car (Driven by Wiggum)
"Otto's" Sale - School Bus (Driven by Otto)
Gil's Sale A - Carl's Canyonaro (No Driver)

Gil's Sale B - Sea Captain's Boatcar (Driven by Sea Captain)

1st Mission:
Start Location - Inside the Android's Dungeon
Name - Nerd Race King
Opening Conversation - Mostly unchanged, but Carl is asking for help finding the whole Simpson Family
Objectives - Race the Nerd to the Itchy & Scratchy Store/Destroy "Itchy & Scratchy's" Police Car

Closing Conversation - Carl comments on the Green Itchy and Scratchy/CBG just focuses on his new comic book/Carl asks CBG if he can actually help him or not/CBG tells him to try speaking with Milhouse, as he was last seen with Bart before he disappeared
2nd Mission:
Start Location - Noiseland Arcade
Name - Clueless
Opening Conversation - Carl tries talking to Milhouse/Milhouse is kidnapped by a Black Limo
Objectives - Get in your Vehicle/Follow the Black Limo/Destroy the Black Sedan/Follow the Black Limo/Investigate the Black Limo
Closing Conversation - Carl realises the Limo is a decoy/Carl now thinks about his next move/Lenny suggests they go to see Professor Frink
3rd Mission:
Start Location - Inside the Observatory
Name - Greenhouse Gasses
Opening Conversation - Carl talks to "Frink" but instantly realises it's not him/"Frink" warns him about defying the Aliens and not letting them take over Springfield/Carl distracts "Frink" while he flees
Objectives - Get in your Vehicle/Escape the Black Sedan/Get to Planet Hype/Destroy "Lisa's" Malibu Stacy Car/Get to the Simpsons House/Enter the Simpsons Kitchen
Closing Conversation - Carl breaths a sigh of relief/Lenny just hopes they can find the real Simpsons before they have to rename the show
4th Mission:
Start Location - Simpsons Kitchen
Name - Leonard & Carlson
Opening Conversation - Carl suggests they look for clues at the boardwalk/Lenny agrees
Objectives - Leave the house/Get in your Vehicle/Get to the Squidport/Talk to the Sea Captain/Get aboard the Ship/Search for Lisa/Destroy Mini UFO (Reskinned Wasp Camera)/Search for Lisa/Destroy Mini UFO/Find Lisa
Closing Conversation - Lisa thanks Carl for helping her escape/Carl asks what's going on/Lisa tells him that Aliens are abducting humans and replacing them with Green Clones/Carl says he knew there was a simple explanation
5th Mission:
Start Location - Simpsons Kitchen
Name - Family Feud
Opening Conversation - Lisa tells Lenny and Carl to round up the other Green Simpsons/Lenny asks how they're supposed to do that/Lisa tells them to lure them with their favorite things
Objectives - Leave the house/Find a Donut Truck/Destroy the Donut Truck/Collect the box of Donuts/Get to Krustylu Studios/Destroy Mini UFOs/Talk to Krusty/Get back in your Vehicle (which now has Krusty in the back)/Get to Camp Krusty/Talk to Maggie/Get back in your Vehicle (which now has Krusty and Maggie in the back)/Get to Barney's Bowl-O-Rama
Closing Conversation - Lisa congratulates Lenny and Carl on a job well done/Lenny cheers/Carl just cheers unenthusiastically
6th Mission:
Start Location - Inside Barney's Bowl-O-Rama
Name - Strike Out
Opening Conversation - Lisa tells Lenny and Carl that their plan worked/Carl says that it's time to find out where the other Simpsons are
Objectives - (Green Marge, Bart, and Homer are all at the end of a lane) Bowl with "Bart" until he surrenders/Bowl with "Marge" until she surrenders/Bowl with "Homer" until he surrenders
Closing Conversation - "Homer" tells Lenny, Carl, and Lisa where all the kidnapped Springfielders are being held/Lenny, Carl, and Lisa celebrate/"Bart" then tells them where to find the Aliens/Lenny and Carl both scream about the Duff Brewery being taken over by the Aliens/Lisa just sighs with disappointment
7th Mission:
Start Location - Camp Krusty
Name - Road Trip
Opening Conversation - Carl tells everyone to prepare for their trip to the Duff Brewery/Lisa points out that there's not enough room for everyone in Lenny's Canyanaro/Lenny suggests borrowing Otto's School Bus
Objectives - Buy Otto's School Bus (If not already owned)/Get in Otto's School Bus (which has Otto driving with Carl in the front passenger seat, then Lenny, Lisa, Maggie, "Homer", and Krusty in the other seats)/Get to the Android's Dungeon/Pick up CBG/Get to the Aztec Theatre/Destroy the Black Sedans/Pick up SVT/Go to the Squidport/destroy Mini UFOs/Talk to the Sea Captain/Get back in Otto's School Bus (which now has CBG, SVT, and Sea Captain added to the passenger seats)/Get to the Duff Brewery
Closing Conversation - The team all watch as Kang & Kodos prepare their UFO to take over Springfield/CBG comments that it's the "Worst plan ever"/Lenny and Carl panic/SVT points out that it'll be better than working at Krusty Burger/then Sea Captain says they'll not get very far since he sold them tainted fish oil instead of proper gasoline/Kang & Kodos laugh evilly as the screen turns black and they take off, only for their UFO to explode
Bonus Mission:
Start Location - Burns Casino
Name - Slithery Sleuthing (Larry's Funeral Outfit is required as the disguise)
Opening Conversation - Mostly unchanged, but Carl is asking for help finding the whole Simpson Family
Objectives - Unchanged
Closing Conversation - Wiggum just offers Carl a ride whenever he needs it
Level 4:
Map Details:
Location - Suburbs (Halloween)
TOD - Midnight
IInteriors - Frink's Basement/Simpsons Living Room/Kwik-E-Mart/School Hallway
Notable Changes - Frink's House next to the Cemetery
Clothing Stores - Frink's Basement/Simpsons Living Room/Kwik-E-Mart/School Hallway
Player:
Character - Maggie Simpson
Personal Vehicle - Horror Roller (Driven by Hugo)

Outfits - Standard/Bouncing Battle Baby




Unlockable Vehicles:
3 Races - Monster Maggie

Bonus Mission -
Character Sale -
Gil's Sale A -
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Level 5:
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Level 6:
Map Details:
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3 Races -
Bonus Mission -
Character Sale -
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Level 7:
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Unlockable Vehicles:
3 Races -
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