The point is to be inspired by the picture. Do car designers put what they were inspired by in the picture? I think you're getting "inspired" confused with "making it look like it" or "putting it in it."
This is exactly how it's different from normal comps. When you see that picture, you should think of something you like about the picture, like the color, then use that color in your photo. What you shouldn't do is say "I need to put that flower into my photo, so I'll just paste it on a picture that has nothing else to do with it and it will fit perfectly."
But Gnasha's is different, that pic has a Citroen with that color, and a whole feild of flowers below. Maybe the inspiration came from the shape of the Citroen, or even it's economy, or something different. The point is, think of something in GT that that flower makes you think of, then try to express
that the best you can. No offense jgda9rs, but i just think you're kinda missing the point of "inspiration."
Strangely enough, you didn't use the pic in you're shot, and seemed to be inspired in exactly the way I mean...