scripting tomfoolery

I've been playing with the game's car handling files for a realistic handling mod idea I had, and I've learned a few things.
1. DO NOT SET VEHICLE MASS TO 0.0, it crashes the game when you attempt to interact with it.
2. if you set a vehicle above a certain mass it will phase through solid objects.
3. Hit Points are the vehicle's health system.
4. Level 5s armored truck mission hates being tampered with.
5. To edit mission cars, you go Shar, Scripts, Cars and scroll until you see mission.
Update, I am no longer able to play 5-6, the game keeps shutting down, all other missions are ok.

My favorite scripting tomfoolery is teleporting the player in a car while driving another - which will result in having the player control two cars.
You can go a few steps further & give the AI control to the car you teleported the player into & have the perspective of an AI car & watching the other car you control from a 3rd person perspective.