Interesting! Is it going to be a Black Bomber look-alike or a café bike? 
I use Paint.net too for some picture editing with layers and it's a powerful editing software given that it's free.frogman79 said:I happen to like a free program call paint.net. It's free editing software that is just about as full featured as some of the good paid for versions and it will let you do all sorta stuff to just about any image file I can think of.
http://www.getpaint.net/
I have been using it for years the the guy that codes it regularly updates it and adds in goodies too.