I've never bought iTunes music/movies before so I never bothered to know this stuff. I only buy iPhone games, and as you know it's no problem to just re-download them after a erase-and-install or whatever. But with movies+music, you can't do this. I know they are riddled with DRM (the movies, anyway), so I'm wondering how I'd preserve them between reinstalls. I know I can burn a DVD or CD and do it that way. But to be environmentally friendly (and more hassle-free ) can I just, say, transfer the movies to a folder on my iDisk, then after the reinstall, transfer it back into iTunes? Will it retain all the information, play back fine, and everything despite the DRM?