Why not switch to a better game engine? While rigs of rods allowed us to expand the monster truck simulation/game freeware market, there's other engines out that allow for track deformation, light sources, etc.. at a better optimized state. We've got the truck models (more specifically chassis), it'd just be about figuring the physics and little bit of coding that would be necessary which I'm sure if we asked for help we might be able to get it. Just my 2 cents.