Please someone help. Ive been trying to play some .avi files and for some reason only 20% play in quicktime other times it says "Need Additional components"  So I was told to get Dvix, now thats saying Codec 3.6.2 Incompatible. Reading this forum you all rave about VLC. Tried that nada!! Nothing seems to be working for me on my Macbook. Please Help!!!!