[saltman]

vegas will not accept the .vob files from the dvd.

you will have to open it with tmpgenc (or similar) and demux (demultiplex) the .vob files into the elementary streams. m2v and wav (or ac3). import these files into vegas. align both audios. trim the new one to match the old exactly. then use the m2v and the new wav in DVDA and make your menus. You will be stuck with the original 2 discs. but you will have the best video. and new audio.