[Sticks]

Alternatively, if your movie clip is on mpg format, .avi, .wmv or any movie format readable by Windows Movie Maker, (Available with XP SP2), import it into Windows Movie Maker, select time-line as opposed to Story Board and drag the movie clip to the Audio / Music line.

Then do Save Movie or Publish Movie if on Vista and you create a .wma file of the audio track of the movie clip. The benefit of doing it this way is that you have a chance of editing out any extraneous sound. Do this first on the video clip using the split / splice clip facility.