Hi ! I think I am the youngest on this forum, but I'll try to help as much as I can.
For Metallisoft : go to
www.voodoofiles.com and you'll find in the upper right corner of the page the list with the most popular driver downloads. Select from there the Voodoo 2/3000 win2k drivers and install them. On the 28th August 2002 this driver was the 7th on the list. If you don't find it there, make a search with " Voodoo3 2/3000 W2K ".
Also you can try this link ->
http://www.3dgw.com/drivers/drivers.php3?driver=voodoo3. I've not checked these drivers yet because the file size is too big for my dial-up connection, but maybe you can download the drivers you need from here and try them.
Good luck and please let me know what you have done, because I also have a Voodoo3 3000 which caused the one whom I got it from some troubles, but the driver that I've downloaded from voodoofiles.com works excellent for me in Win2k with SP3.