Disable Intro Movies=1
In Windows, if you are running Neverwinter Nights 2 off of any drive other than the C: drive, there are special system requirements for the game. In addition to the 5.5 GB of free hard-disk space required to install the game on your selected drive, you will need an additional 2-5 GB of free hard disk space on drive C: during run-time. Not having 2-5 GB free on drive C: while playing Neverwinter Nights 2 can cause the following issues:
This extension fixes many bugs associated with the game, including choppy camera movement and animation glitches. In addition, it significantly improves multiplayer functionality. Details can be found on the download site.