So my curiosity got the better of me. Fired up cheat engine and went to work. The game doesn't use static variables, so pointers would have to be found for everything to work BUT..... All the I/O data can be found in the same general area and simply NOPing the functions that write to the wheel and pedals allows one to write their on values, thus allowing for total control.
The game uses a standard sega style +-15 wheel control system. I'm not sure how good I could craft an effect, but the data is easy enough to parse at least.
I don't want or need a project atm, I've got a backlog a mile long, but yeah if the authors of this hack can't figure it out, I can step in.