I screwed up and lost everything on my HD. I have backups of most things but I can't find an ac3 codec so my MPEG4/ac3 avi files have no sound.<P>Does anyone know where I can download one from, for ...

I found this one but it is terrible, not in the least usable. A lot of my XviD/DivX video files have AC3 or A52 audio tracks for some reason and I'd like to play them in QuickTime, which as it turns ...