I'm not sure exactly why you're having problems. I'd use MPC-HC instead. You should probably also use VMR9 for the output. The rest of your programs are quite out of date, though I'm not sure if that's causing your problem or not.
My last HTPC had a less capable AMD CPU (2800+) with an AGP nVidia 6600GT with XP Pro and got perfect 1080i60, 720p60, & DVD playback, though I wasn't using S-video out. I used DVI.[/QU
Problem with this 9600 GT is it did not come with a composite out spliter. I have one, but, don't have the cables that would allow hooking it up in that format.
Plus, I don't have a composite video cable, only sound cables, monster mainly, for hooking up other sound devices. Do you have a link to where I could find an optical cable, and, composite splitter that would work with Nvidia cards?
The only cable that came with the card was the S-video cable. The only inputs on this TV are the three wire composite, and, the s-video.
So far in testing, the Media Player Classic is giving flawless performance at
720x480, with no lip sync problems. The picture is CRYSTAL clear, and, increasing resolution does not appear to increase visual quality. Maybe it's source limited?