Windows 2000 is 13 years old, and support for it ended on July 13, 2010. I doubt you will be able to find drivers for it, maybe you could try on the manufacturer's support webpage. But i strongly recommend you to upgrade to a newer operating system such as Windows 7 or Lubuntu 12.10.
Windows 7 has a 30-day free trial. You can download the official Windows 7 Install DVD ISO images from here. You will have to buy a license after that, so I recommend getting Windows 7 Home Premium 32-bit (x86) for compatibility and because it is cheaper. Try it before buying it, to make sure it runs OK on your hardware.
Lubuntu is a light version of Ubuntu, better for old computers. It is free, you can download it from http://lubuntu.net/ . You can first try Lubuntu from the install CD without having to actually install it, give it a try.
There are also other free Linux distributions suitable for you, such as Linux Mint ( http://www.linuxmint.com ) or Zorin OS ( http://zorin-os.com/ ), which is focused towards Windows users installing Linux for the first time.
You can find help about installing Windows 7 or any Linux distribution on this forum.