I have an old Windows 98 SE computer, and I reinstalled Windows without making a backup of all the drivers.

(stupid, I know... I wasn't really thinking about what I was doing)
A friend built the computer for us a long time ago and upgraded a lot of it a few years ago. It has an ECS L7VMM3 motherboard and an ASUS V8170 MAGIC graphics/video card. The motherboard has an onboard VGA port, which is what my monitor is connected to. I am trying to install the driver for the graphics card, but I'm having trouble doing so.
It's obvious that it isn't working, mostly because when I plug the monitor into the card it doesn't work. I tried downloading the graphic card's driver from the ASUS website, but whenever I try to install it (by right clicking on the desktop, choosing properties>advanced, then changing the driver), I think it changes the driver for the onboard graphics rather than the graphics card, because it still doesn't work.
Does anyone have any ideas as to how I might get my graphics card to be recognized?