Hi PaQ, I've seen a few different image layouts for cars, it still may help if you could show me a sketch (even just a rough one) of the particular layout that you're trying to get.

Also I don't know if it applies to your situation but here is a previous illustration on how to align one image to match up along side an existing one:
http://moi3d.com/forum/index.php?webtag=MOI&msg=2501.15

- Michael