This is my first shot at trying to playback an HDTV file, a 15GB 1080i of Star Wars episode 4 (curious how a movie from 1977 looks in 1080i...). I originally had the .ts packets and used HDTVtoMPEG2 to make it one large file. So I read up on it as much as I could and tried a few different players, two were highly recommended, zoom player and The Core player. Playback is jerky, my resources are not being used, processor stays around 11%, memory around half of my total. My setup, AMD 2500+, 1GB DDR ram with Nvidia GeForce 6800 GS/XT (supports H264, I got purevideo codec for it, where that is I have no clue) with current NForce drivers. I have no other playback issues and have collected a fair amount of codecs due to avi playback. So I get Gspot and AVicodec 1.2 to tell me what codecs I need, both programs tell me the required codecs are installed (avi just says 'supported' and GSpot says the combination of Dscaler Mpeg2 decoder and AC3Filter are supposed to work, so I fire up zoom player and set the options under options/setup and chose MPEG2 Audio (AC3Filter) and MPEG2 Transport Video (Dscaler) and I hear and see video but its really choppy. Any help much appreciated. Thanks.