Yeah. That's what amazed me. It's a whole movie with no actual sets, just greenscreen. Whoa. Kinda boggles the mind. I mean, I know they've made whole cg MOVIES before, but this one has a slight attemp at realism. (They also wanna keep it kinda fakey, which I think it totally awesome). As far as the music thing goes, yeah, that always catches me off guard, but they do it a lot. Generally they release the trailers before the movie's been finished, and since they generally do the music as one of the last things (since the music usually relies heavily on the editing) they just get permission to use music from a different movie. I believe "Alamo" (or whatever it was called) had a trailer which featured the gladiator music. BIZarre.