Ok I just downloaded it - you just run the file will you want to use it. No install involved so if you don't want it just delete it. I opened an avi in it with the 'quick open file'. Find on this end but I'm not running XP or trying an mov files. I can't find where ffdshow has support for mov files but that's not saying it might not. If you have QuickTime installed that would have the codecs already. I'm also not running into much luck finding a codec pack that is Vista compatible and also says it supports mov files.