That is awesome Paul!
Something like this will work great :)
I'll have to check out that Wings3D program.

Could you make more of a body line from the tip of the nose to the top of the front wheel well, to the top of the rear wheel, and on to the rear end. This line also needs to go outward a bit. (Make sense?) I suppose the rear "split window" would be kinda tough... It'll also have a spoiler and hood scoop

What formats can you save this in? I'll probably use Photoshop to map
and Bryce to render in... thanks so much!

It will look something like these...
black body with paint scheme/logo




Please pardon my scribbles on your work