Help mixing audio

[HeyYoWL]

Hey guys, thought someone might be able to help me with this.

Ok so my parents bought this Korean drama in VCD format, and it has two languages. Korean in the left channel of the audio, and Mandarin in the left side of the audio. Now they wanted me to backup the show, and I was going to back it up on to 70 VCDs (each CD is 1 episode) since making ISO's of 70 CDs and burning them is time consuming and annoying.

Just when I was prepared to convert all 70 episodes into MPEG-2 though, my friend said her parents bought a DVD version of the same show, but it has Korean and Cantonese for the audio track.

What I wanted to know is, does anyone know of a way that I can rip the audio from the VCD's, convert the audio, and replace the audio on the DVDs in a more or less painless way? It would save me lots of time if I didn't have to re-encode the VCDs to MPEG-2.

One more thing though, although the DVDs have 2 languages on them, when I play it on my standalone DVD player, I only hear Korean, and I can't switch the audio at all. Meanwhile my friend's standalone can, and on my computer, I can hear both tracks at the same time, which means I'm assuming that there's 1 language on each side of the stereo track. I wonder if anyone knows how to fix that problem? Of course switching the VCD and DVD audio is the most important thing since I could always just split the audio from the VCD's and make them 2 seperate and selectable audio tracks on the DVD.

Thanks to anyone who helps, much appreciated. :)

[Baldrick]

Demux the audio from the vcd with tmpgenc file->mpeg tools.
Demux the dvd to video and audio files with dvddecrypter
Add the video and select the mp2 from the vcd. You will lose the other audio and menus.

If you want to keep all audio tracks you must use something that supports several tracks like dvd-lab pro.

If you want to keep menus...i don't know...

You will also probably get audio sync problems.