paula89, welcome to the Seven Forums.
To answer your question, quite simply you don't. There is not now and never will be a Windows 7
driver for that card, as Nvidia dropped support for it a long time ago. The best you can do is the last XP
driver,
ForceWare Windows XP/2000 32-bit
Probably have to use compatibility mode,
Compatibility Mode
to get it to install. It the rest of the computer is of similar vintage as the video card, there is also a good possibility that the video
driver won't install due to the lack of a working AGP/GART driver.