Liberalis has posted some nice shots of "Mini models" & several other people have said that they'll shoot some too, so put one of your best shots here with a link to your thread.
If you can, post a shot of your set-up & give use any details that you can to help other guys out & we'll see what we can come up with.
Here are some links to help out:
FAQ - Studio Lighting
Michael Paul Smith models - great stuff!
He makes models & photographs them so they look as if they're real cars in real locations. No PS was used on the images.
Some shots near the end show the sets.
Slideshow
This is a model I made & shot on film years ago of a JPS F-1 car so, no shot of the set. I think I only used one light, so it shouldn't be too hard to figure out what I did.