Harry,
I'll look into whether dvd shink will allow me to do what I want.
Somewhere I got the impression that I had to convert the video to re-author, but perhaps not.
I was using the authoring tool in Roxio 7 (called DVD Builder) and it wants the input video to be in the form of AVI, MPEG, and several others, so I thought I had to convert to one of them first.
Perhaps the limitations of my tool suite is causing me to make bad assumptions.