Is there a way to make a Rally F1 Car? Or maybe a Rally Viper? Evrytime I try the game locks up when I try to Go to any track with it. I've added rally car suspentions, chassis, and drive trains to a F1, but to no avail. Is it possible? Also, I want to know how the Turbo Boost Modifier codes work. ( Turbo 1, Turbo 2, Turbo 3)I'm not quite sure I understand these, I can edit them, but I doin't see much of a difference any time I do. PS. I added a 787B turbo on a F688/s and the acceleration, handeling, top speed,etc. are perfect for me.