MPEG 2 (dvd) video stutters A LOT (1 Viewer)

[emphatic]

MediaPortal Version: 1.1
MediaPortal Skin: Maya, X-Factor, StreamedMP, Black Glass Nova
Windows Version: Windows XP MCE 2005 SP3
CPU Type: AMD
HDD: Caviar Green 2TB + external USB drives
Memory: 4 GB
Motherboard:
Video Card: Asus 9400 GT (Nvidia powered)
Video Card Driver: Latest Nvidia ForceWare (July 15)
Sound Card: SoundBlaster Live! 24Bit external (USB)
MPEG2 Video Codec: ffdshow (SAF 4.0)
MPEG2 Audio Codec: ffdshow (SAF 4.0)
h.264 Video Codec: ffdshow (SAF 4.0)
TV: Panasonic running 1920x1080p @ 50hz
TV - HTPC Connection: DVI->HDMI

All of my xvid, h264 (1080p, 720p) videos run perfectly smooth (some random frame drops but acceptable to me), but PAL video_ts format dvd-rips stutters like crazy, especially at the start, but from time to time during a full movie as well. NTSC video is impossible to watch at 50 hz, even with ReClock, so I avoid watching my US imports in MediaPortal. I've tried to use Automatic Refresh Rate Changer to switch from 50hz -> 60hz for 29.97fps material, but MediaPortals switcher fails to set the correct refresh rate or something, because while it's reported to have changed to 60hz, NTSC material stutters like crazy and is unwatchable.

Is there an easy solution to this that I'm missing?
Emph

 

[SiLenTYL]

try cyberlink poweredvd 10 codecs?

 

[hoborg]

Is there an easy solution to this that I'm missing?
Emph

Yes - set your TV to 60hz, or get PAL version of this DVD...