I was getting ready to do a stream of Wing Commander 4 and noticed that the walking videos on the Lexington had no sound. So, I extracted the audio from those videos from the CD version, and reencoded them to AC3. To use these, you'll need to load SC_5150A.VOB through SC_5150G.VOB in AviDemux, go to Select Track under the audio menu, click on the box that says Track 0 from audio, and then click add audio track. Select the .ac3 file for the VOB file. Then make sure that the output format on the main window is set to MPEG-PS Muxer, and that the video and audio are set to copy. Do that for all seven of the files. Then, rename them to .VOB files and copy them to where you have your VOB files stored. Hopefully, someone who has permissions to upload larger files can upload the full fixed files for those of you who don't want to do it yourselves. Have fun with this!