Making my own carset

gday ive got a few problems when i make my own carset i have a few problems

1. the cockpits are all warped some white some are good some are just not right
2. sterring whell positions, arm colours wheel brands,. i know u can change them using team editor but how do u do that in the mod folder
3.i can only have 1 mp4 18 but i want 2, 1 for my hdt holden and 1 for my jaguar
4. some helmets are warped, ios this because some ar hi res and some arent or because im using a set sahpe?

help would be goood if ya can cheers


__________________________________________________________________________