Again, thanks for all your help!
The problem I keep having with WAVs is that they always render 10 seconds shorter than the MPEG-Files. Basically, it cuts 10 seconds of the end (around 10 secs, not exactly).
Since our customers will use the DVD on their computers, I guess I we are ok with MPEG2 audio.
I do understand the concerns regarding other NTSC players in the US.
Cheers,
Michael