Is it possible to create a DVD with an AC3 audio track rather than a PCM audio track using Ulead DVD Workshop?

I've already stripped out the audio track from the MPEG2 file using TMPGEnc, and then converted it to an AC3 audio track using BeSweet.

If it's not possible to do this using Ulead DVD Workshop, which tools should I be looking at using?

Also, how can I go about improving my process? I'm assuming what I really want to do is capture an AVI and a WAV file when I do the capture, rather than having them combined. What would be the best tools for this?

Thanks,
Zane