speed-up playing xvid movies

Hi all
Is there any way to speed-up playing a xvid movie, when i play my xvid
movie from the HDD,
the movie played with mini-pauses and less-frames.
with my  PC i can play MPEG1 movie with normal speed, now i want to
use any parameters (like buffer bitstream data) to play
the xvid movie with normal speed.
How can i do it?

My PC hardware is:
RAM: 256 MB
CPU: 333 MHZ
VGA: Trident
OS: Win2003