I have Direct DVD 4.03ES running on a Athlon 1800XP with 256DDR Ram and Win XP Pro. I currently am running a Sis 8mb video card while my gf2 is being repaired under warranty - I cannot get a smooth dvd playback no matter what resolution of colour depth i use! I also have a trial of power DVD which runs absolutely fine! ahhh! I just cannot get it to playback smoothly! Is this just an inferior set of codecs or is there some fine point I'm missing?? Any advice gratefuly recieved!