- last post: 01.01.0001 12:00 AM PDT
You're obviously confused about this whole driver deal. Drivers are what make your hardware work with your selected operating system (i.e. Windows). Drivers will certainly affect the performance of various games, but you don't install drivers for games. You install drivers for your 3D graphics card, which in turn usually performs better as the manufacturer fixes performance issues and releases updated drivers to the public.
If you have an ATI video card, go to the ATI website, not Nvidia's. I don't know what got you thinking about Nvidia, but they are ATI's competitor and will not carry the drivers you are looking for. Here's a lazy link to ATI's website. Somewhere on ATI's website you will find their driver download page. Before it will allow you to download a file, you will need to specify what type of software you're looking for, what version of Windows you're running, and maybe one or two other things that I can't recall off the top of my head.
In any case, once you've downloaded the driver file, go to your Control Panel --> Add/Remove Software. You will need to find an entry for your ATI driver and any associated ATI software. They all will have "ATI" in their name. Uninstall all of it (if there are multiple ATI listings, don't bother restarting inbetween uninstalling them). Once everything is uninstalled, restart your computer. Depending on the version of Windows you are running, when Windows boots back up the colors may look ugly and your resolution/refresh rate will be low. Do no let Windows auto-install a driver upon start up. A window will come up saying "Windows has found new hardware" or something like that and it will want to automatically search your hard drive for an appropriate driver. Cancel out of that and double click on the driver file you downloaded. Follow the instructions and read all the driver instalation instructions to make sure I didn't forget to tell you about a step. Once you follow the steps and the driver is installed, you will be asked to restart. Once that's finished, right click on the desktop --> Properties. Click on the Settings tab to adjust your color depth, screen resolution, and (click the "Advanced..." button) to adjust your monitor's refresh rate so the screen is easier to look at.
Hopefully that gets you started in the right direction and all the above info is correct, as I'm on a Mac atm and doing this from memory. : P