Thanks for the help, I have downloaded all the codes I can find for my Pronto 1000, I'll look into the different code sets.

My reasoning (or lack of) for the two players is that I've had the Sony single tray player for quite a while, and wanted to add the 400 disc changer to catalog my DVD collection and maybe keep the kids' fingers off of them, but I didn't want to lose my single tray option when I rent movies.

Thanks again for all your help and suggestions!