Needing help extracting audio from dual-audio divx avi

Archived from groups: alt.video.divx,rec.video.desktop (More info?)

Hey guys,

I've asked this question on a couple of different forums, and gotten
nowhere. I really hope someone can help with what I imagine is a
simple process.

I have several divx files that have dual-audio (commentary tracks) and
I want them made into DVDs. Now, I know how to use VirtualDub to
extract the wav from an avi, but how can i make the program choose
between the two audio streams?

Also, once that's done, I plan to use TMPEGenc to mux the video and
audio (main movie) into an avi, and then use DVD workshop to add the
extra commentary track. Hope this will work, but any comments,
suggestions or alternatives will be greatly appreciated.

With thanks,

Sgt-Pepper.