Edit: Pinned by Drows: Lets see those design. Edit: Because people keep asking. You cannot bring your own images into the game, you have to layer different decals to form whatever it is you want to make.
Also, a few people are linking their pictures from the forzamotorsport.net picture locations... To the people that are doing this, we CANNOT see your pictures (you may be able to, but we cannot.) You have to use a another website to link from, such as photobucket.com
Here are a couple of mine:
The GeekSquad car (I know, a lot of others have done it first, but I wanted to make my own)
The "Lone Wolf"
I'd like to see some of yours...!
max sig img size 115h x 480w. Thanks