So, I have a multi-monitor setup with a GeForce 6600 GT PCI-E (128MB) video card and two 21" Trinitron CRTs hooked up to it. Windows XP is able to see both monitors and I can use the desktop on both monitors as well. I'm also able to play games on the primary monitor with no difficulty. The problems show up when I try to do video playback on the secondary monitor. AVI files will play OK, but DVD's and MPEG files will not. What happens is that I hear the audio, but only see a black screen. I've tried playing DVD's through both Windows Media Player 10 and WinDVD 7, but both do the same thing. I'm assuming this is an overlay problem, but I have no idea how to fix it. I've tried installing newer drivers and fiddling around with the nVidia display program, but no luck so far. Please offer up any suggestions you may have. Thanks!