How to add custom sounds?

Do I have to add them on a specific line or can it just be at the bottom?

Anywhere is fine, but putting them to the bottom is probably best for easy finding. Btw Kru is krustys character code(You'll need that to actually add the sounds.)

I don't know if the sounds are gonna work or not because every time I import them into the RSD, the format changes to RSD4PCM instead of RSD4RADP.

Do the rsd files still work after that?

I've had one issue when I saved one (a RideReply one) and opened it again and it was almost solid static. I tried replacing it again and now it's slightly higher pitched than normal and the format's wrong.

Could you give download links to the original and the rds version?

Fun fact: The original files from Road Rage were not even rsd, they were rsp, so when I exported them I set it to All Files and put ".rsd" at the end and took it from there.

Original: www.mediafire.com/?fflqd2i1l862h7y
Slightly Higher Pitched: www.mediafire.com/file/5wdro0mmtq3b5al/KRU0001b_-_Higher_Pitched.rsd

Are you saying you used RSP files from Road Rage? I don't think that will work as is for a variety of reasons.

I have nowhere else to get the sounds from which is why I chose Road Rage.

So you didn't use RSD Converter?