good stuff, I agree with jaziba on the materials! 🙂 if you need any help lemme know.
as far as mod goes I've only noticed one thing that would need fixing, main cfg for e.g.
cars\racers\Einvagen_data\meshes\_phys_chassis_cockpit.scx
would be good to change it to point to JAG's own folder with it's own physics.. some people will have old/messed around versions of einvagen and the car will be undrivable/jump around the garage
same with parts of course, ever part needs to point to JAG folder for physics not the car it was based on 🙂