[livedead13]

ok, i gotcha. so you want to demux the original video & audio, and mulitplex the original video with the new audio, which has been rendered from Vegas to match your video. i don't know what authoring software your using, but i would imagine that it would be able to do this, and you could skip using tmpge.

i use DVD Lab Pro, for example, and all i would have to do is import the video file into the assets bin, select demux, remove the audio file. then import the new audio file, and drag it to the video timeline.

hope that helps.