Gentlemen I'm not sure how you could be getting a type mismatch error.... there isn't much in the way of settings as you've noticed. I know it's a pain, but you might want to try setting your computers to English if they aren't already. Sometimes foreign keyboards do odd stuff to programs and that's all I can think of.
Anyway, here is version 2, it adds Gearshift support! Thanks to SailorSat for her realization that the game is actually running an emulated version of the original model 2 game underneath, which allowed us to find a gearshift solution.
DaytonaLaunch2.0.rar