Hi, Gretsch,
Try this... Try increasing the video hardware acceleration. There are two video hardware acceleration settings—one in the Player, and one in the Windows operating system. You must change both settings.
To change the setting in the Player, on the Tools menu, click Options, and then click the Performance tab. Move the Video acceleration slider to Full.
To change the setting in Windows, click Start, click Control Panel, double-click Display, click the Settings tab, click Advanced, and then click the Troubleshoot tab. Move the Hardware acceleration slider to Full.
http://www.webuser.co.uk/forums/show...53/an/0/page/4
The above from the website given.
I don't know if this will definitely solve the "jerky" issue, but it's worth a shot.
Best of luck.