You mean double click on Setup.exe?
Although that's good for XP, there's a pdf floating around that in 98/Me you're supposed to install things separately in Device manager. This is because it would mess up the sound card and display drivers which I do not want installed from the Setup.exe file.
The way I took care of the problem is I let it install the standard driver for it, but I'd prefer to point to a specific nForce2 driver folder. Choices are
AudioDrv
AudioUtl
Display
Ethernet
GART
MemCtl
SMBus
Could it be GART?