AC3/A52 codec plugin for mac

I can't believe i'm the only one out there having trouble with AC3 audio via Quicktime.

So for anyone else who with troubles with .avi files with no sound goto

The A52Codec is a CoreAudio component that can decode stereo and 5.1 surround sound from A52 and AC-3 audio. This type of audio is often found in DVD movies. Requirements;Mac OS X 10.4 or later, QuickTime 7.0.1 or later.