hi, I use Relock and set my refresh rate to 23.976.
Warning though, Relock uses alot of the cpu to do its magic.
QUOTE=rgronevelt;15260193]I working on a second HTPC...first is still a PDVD 7.3 set-up, and I have no issues playing B-RAY or HD-DVD, some from ISO, and some from file structure. However, I am having major problems with any HD material on the second. After messing with PDVD for too long, I've now been working with TMT. It is on a clean install of Vista Ult 32 bit. 3.4g Dual Core P4, 2GB, an ATI 2600xt PCI card. I've tried with latest Cat (drivers only), and 8.4 version. I've tried with Hardware Accel on and off, but cannot get stutter-free playback. I've read through this forum and others for a long time, trying many good suggestions, but still can get it to work.