Why not compress the audio as lossless FLAC, then I believe you can mux with the video into the OGM container. Not that I've had much experience of using this format, but it's an idea.

You had enough experience to encode the mono mix in that format!

I'd like to chime in on this to say that I would absolutely LOVE separate downloads of just the different audio mixes from LD.

Let me repeat: This is a wonderful idea.

How many torrents has anyone seen for downloading the 1984 pan-scan LD transfer of SW? None. And consequently very few people have the original stereo mix. I can't do this myself, but it would be wonderful if someone ran an FTP network and posted these sound mixes in month-long intervals or so:

-Original theatrical stereo from '84 LD
-Original mono from the UK broadcast (I already have this)
-Burtt's '86 revised stereo mix from '92 LD (or earlier, unless inferior quality)
-Digitally remastered "Faces" edition stereo (DC is said to have some sporadic popping and clicking)
-5.1 surround AC-3 track from the '97 SE LD.

And I know this isn't OT related, but I would also love an obscure foreign language track for Episode I, for prequel re-edits. This is a great idea, though; offer all the mixes separately so that we may pick and choose. It would also help the original mono and stereo mixes in particular to become more widely distributed.