I downloaded the cheat cars, extracted them, and then when I try to change the car in the car menu, the "Quadratic formula explodes." If you know what I mean. If not, then all this weird code crap pops up and the game freezes. I think it can't find the cars... what do I do?
I have no solution to your problem.
but perhaps you could extract those same cars in another version of stunts
1.0 mindscape or 1.1 broderbund for example.
if this doesnt work, I should not be considered responsible of... blabla... bla...
well, you've got nearly the same problem as me except that it works a little better. basically, i extracted the files for the lamborghini lm00, then played stunts and found the car. i could select it, but when i clicked 'let's drive' after selecting the car, i just got some code that came up saying 'please check disc and press any key to continue'. really annoying because i wanted to see what these cars could do.