Dang, my characters are twitchin somethin crazy. It's weird, they're fine right up until the dragon turns my group into Drow, but then usually my main guy or Jaheira will slow down, or stop a few ...hundred feet short.

Suggestions?

This is pretty common, its due to the drow avatars on your characters. Stutter bug. Download the Ease of Use or baldurdash, and install the "No Drow Avatars" mod. It should help.