Hello thd777.
Thanks for the update. I think I'm going to stop my current render job and restart it with png output as your settings show.  Can you provide some tips on how I would assemble all the png files using Flash? I have Flash CS4 Professional. Is there something like an import in the menus that lets you specify a directory of a few thousand files that converts them to a movie? I have Sony Vegas Studio and am wondering if I can do it with that.  In the past I have always just made my movies with a single avi but this time I think my movie is going to be too big for a single file.