See thread describing the mono mix restoration project:
http://www.originaltrilogy.com/forum/messageview.cfm?catid=9&threadid=7222

Here's a quick guide to create a DVD with this audio track:

1. Copy the files from the Region 1 GOUT disc onto your hard drive using DVD Decrypter.

2. Using PgcDemux, demux the MPEG-2 video and alien subtitles, and extract celltimes.txt. (Do not use IfoEdit to demux the subs or Muxman will throw up an error later on).

3. Open the mono mix WAV with an audio editor (e.g. Sound Forge, Audacity) and insert 1.017s of silence at the start of the file; save.

4. Use Muxman (standard version) to multiplex the M2V video, delay-corrected WAV audio and subtitles, using the celltimes.txt file to set chapter points.

5. Use IfoEdit to copy the subtitle colour palette from the official disc, VTS_03_0.IFO, PGC1, and paste into VTS_01_0.IFO of your newly authored DVD (if you don't do this, Greedo's subs will appear in red text!)

(6. At this point I used PgcEdit to insert a pre-command to turn the subtitles on by default; not sure if this step is necessary or not.)

7. Use ImgBurn in build mode to build the disc image and burn to a dual-layer disc.

Post here with any questions/comments, or if you need a more detailed guide.