I thing you might have a few m-peg layer 3 decoders installed and windows is trying to figure out which on to use. In the struggle you get sound that lag.
Eheheh... sometimes I wonder where in the world people pick up information like this
Having multiple mp3 codecs will not cause your sound to lag. Under this assumption, windows would have to be saying "well wtf, i dont think im using the right mp3 codec, lets try is other one", back and forth, the entire time the video is playing. It just doesnt work that way. The codecs are decided upon when the video is opened.
Anyways, the only codecs you should need are Divx3.11 alpha, Divx5.02. You should also pick up the ffdshow decoder. Using an alternate video player as I stated before would most likely solve your problem. If the episodes you are trying to view are in divx5, perhaps use the divx player that comes included with divx5, its very fast at decoding divx5 content. Also make sure you set the postprocessing options for your playback filter to the lowest setting.