I figure i'm going to have a lot of them, so why not just put it all in one thread instead of a clusterfuck in the mac forum. Question #1: How do i open avi files? Quicktime wouldn't do it, so I downloaded wmp 9 for mac, and i get an error like "Cannot play back the file. The file format is invalid". I used to be able to play these same avi files on my pc without any problems, so im thinking it might be a codec problem perhaps?