By doing a search on Dell's site for that computer, it looks like you have a built in video card, with either the Intel 810 or 815 chipset, both drivers are listed for Win2k. Go to www.dell.com, choose support, enter the model of computer or the service tag number, and it will allow you to get the proper driver. It is very seldom that the monitor driver is actually the problem, it is usually the video card driver. You can also try to set the desktop to Web page display, as the video card will then be able to use more ram to display with than the base amount that the bios is set to.
Good Luck,
Vickie