The video has not been re-encoded, but remuxed.

The audio was exported with the AC3 codec in 384 KBPS, which is the bit rate used on the DVD, so it probably was re-encoded, but it does sound a lot better than the lossy stereo originally used.

As far as sharing goes, using dlc is an option, but how is the dlc file to reach everyone as we can't share it on this site?

At first I thought of an invite based forum, similar to Myspleen but with links, instead of torrents, if anyone has the know how to create such a site.