First of all, thank you so much for replying.  One line you wrote unlocked the puzzle for me.  You mentioned loading uncompressed into Roxio.  I had tried loading uncompressed into Roxio, but the Roxio preview couldn't play it back smoothly so I assumed it wasn't working.  After I read your note, I went ahead and burned a dvd anyway and it worked nicely.  So, it's not always a matter of what you see is what you get!

And I just wanted to mention that I use AfterEffects to crop and brighten (when needed) scenes from Poser, and then I put them into Premiere to build my movie using layers of audio and transitions between video segments, etc.  I don't know AfterEffects well enough to be able to build it all there.  I should do some of the tutorials to learn more about it.