a friend of mine just got a mac and is haveing major trouble with media files. she has wmp and real now. but she can't figure out how to change the media format preferances so the files play in one or the other. so basically how do i change the media formats(meaning setting all mpegs,avi and so on to play only in WMP) to wmp? oh and she has wmp 9 and we need step by step instructions