I just did a test render as a series of images as you guys suggest and it turned out waaaaaay better!

Imported into Flash and got the results I was after. Flash is nice too in that it will automatically import a series of images and put them into their own key frames and all on one layer so I don't have to sit for hours building the movie frame by frame. I can then place any other animation over top of my poser animation and have some pretty great results.

Thanks again, very much appreciated.