What a shame. The only sound mod I seem to be able to find that sounds like Winston Cup cars (Notice Winston), and not Formula 1 electric weedeaters. Sure, the outside the car sound, has the F1 electric weedeater problem but I don't race outside the car.
Unfortunately taking out the spotter sounds, doesn't prevent crashing. I went into the wall, and it crashed the game, after I took out the spotter sounds. I'm going to try and just place the Engine sounds into the sound folder to see if that will work.
Though I would very much like to know how you got sound to play on the title screen. I have my own sound file (ESPN Speedworld Genesis Theme) that I won't to place there intead.