Attached Link: http://www.photoshopchop.com/tutorials/tutorials.htm

Oh, well it didnt sound like that before. So you can get the car white? And you just want to make your own decals and logos and what not? Use your transform tools to position and skew your graphics in place. Play with the layer blending modes to get the graphics to contour to the car. I think you will find the above link very interesting, all you need to know to pimp your image;) When you get there, just scroll down to the: "Creating Decals Tutorial" Cheers and good luck!

I never intended to make art.