while surfing i found this Tip for 2K gamers at 3Dspotlight

Here's another tip for everyone out there with Windows 2000 & wanting better performance out of their games.

Take the following steps;
1. Right click on the desktop, select Properties, then click on the Settings tab,

then the Advanced button, then the Troubleshooting tab.

2. Move the Hardware Acceleration slider 1 notch to the Left from Full.
This will Disable cursor & bitmap accelerations,

which should improve performance in all games, although may make mouse movement a little less sensitive.

However, it will not disable any Rendering features on the graphics cards.

http://www.3dspotlight.com/

hope it may help

regards minir