Then, go to Vegas and load in the WAV file created above as a reference file. Hold down the control key while pushing/pulling the end of the WAV file the number of frames noted above. This will time compress/expand the WAV file. Then sync all your clips to this reference file. Be sure to mute the reference file before you export.
Works like a charm for me every time. If you have long clips to sync, it is best to sync them in the middle of the clip rather than the beginning or the end, as they may get "off" a little because of the time difference. This keeps them from getting off a noticible amount. If you have a REALLY long clip to sync, you may want to splice it in a few places and crossfade a frame or so, just to force it to stay in sync.