The file you refer to is a Quake II driver for Voodoo 2 graphics cards, that uses the '3DNow!' instruction set for optimised performance.You put the two .dll files from the zip file, in your Quake II folder then choose the "3Dnow! 3dfxGL" driver option. The result will be a potential frame rate increase of +30fps.
But..you are using onboard video so you would need a Voodoo card to use those enhancements I'm afraid and the performance you would get in that game would not be reflective of other games.
The Voodoo 2 or 3 cards are great for older K6-2 processors, since the cards themselves offer a lot of processing power. But support has stopped for that card and it's only recommended if you want to play really old games or N64 emulators (I used to play Project IGI and Quake I/II on my rig). For 2D stuff and the Mame32 arcade emulator it would be fine.
Your current system even optimised or using a K6-2+ and PCI card, would still be limited for modern games. You'd be able to run Quake III or GTA Vice City, but the moment there's a lot of action taking place on the screen your frame rate would plummit.
A better option would be a cheap Duron rig, maybe even using onboard video. If you can't stretch that far I would recommend a PCI version of the Geforce 4 MX or Geforce FX 5200 card for better Direct-X support..just don't expect many frames per second. It can be an expensive upgrade considering the system you'd be installing it in, and would still be quite a way behind when compared with the slowest 'Applebred' Duron or Sempron (preferred).
It depends on what you want and how much money you have.
Hope this helps :-)
. AMD CPU Data: http://www.tomshardware.com/20.../amd...ult/page23.html
. Belarc Advisor: http://www.belarc.com/free_download.html
. GPU Comparison for Laptops: <a href="http://www.notebookche