The other problem your going to have is how it looks. The Contour has an extra styling stripe at the bottom which the Mondeo doesn't have. I think you could fill it in with Bondo but that would add at least 30 Lbs to the car all the way around.
I'm sure that it can be done, but at the same time why not find a German Hatchback Shell and bring it over. You'd have a very unique car that way.
