JediMaster: You need TMPGEnc. Its free and very good. What they mean is you you have to take the movie, split it into separate audio and video (Demux or demultiplexing), then re-combine it again (multiplexing).
Demultiplexing:
http://vcdrookie.com/eng/index.php?o...id=6&Itemid=55
You can also do a multiplex, by going to File -> MPEGTools as well.
HTH