Don't know if y'all play the game Nascar 09, but the paint shop feature allows you to design cars. I used to paint for a website (bigalgrafx if any of you play, you probably know what the site is) but more recently just do it for fun.
Anyway, here's my Duke 2010 national champions car. If anyone is interested, I can send you the .dds file to upload it to your game.
(also... I made it on a mustang. If for whatever reason you'd like a different make, that's an easy switcheroo)