I have GalCiv 3, let me use foregrounds!

So Gal Civ 3 has different foreground movies than Gal Civ 4, but I can't for the life of me figure out how to use them in Gal Civ 4.

I'd really like to be able to use the animated foregrounds and backgrounds from Gal Civ 3 in Gal Civ 4.