I have problems playing some movies that are in the mpeg or mpg format. I've downloaded divx and the msmpeg4v1 and msmpeg4v2 codecs and still some of the movies will not play. What other codecs or software should I get? The file tries to play in quicktime, although my old PC played them in windows media player. I've tried playing them with that on my Mac also but it doesn't work either. Both quicktime and wmp say that they can not play this file because it is not a file that they understand or something to that affect.