I have the same problem. I have a Tyan s1854, Celeron 466(overclocked to 525, 75mhz FSB),V770 ultra graphics card, 6X DVD(from my old Compaq 5822). Im running XP. When i let XP installed its own drivers for graphics card, My dvd plays but graphics is slow(35mps). when i installed Detonator XP drivers, graphics double(60mps) but dvd is choppy. What gives? Detonator XP are XP drivers but they dont let me play dvds. im lost.