nVidia installation whacked my network adapter

In doing an upgrade of my nVidia 6600GT video card drivers, I inadvertently deleted all nVidia drivers on my system. That also apparently eliminated the drivers that run my network hardware -- nForce4 Hyper Transport bridge and nForce PCI system management.

Anybody know how I can fix this?

You could just try system restore if you uninstalled your drivers using the uninstaller - go back about 2 days before u installed the drivers.

Then just install the new drivers over the top of the existing ones - surely the install program will automatically remove the old ones and update the new ones?

If you deleted them manually (i.e. right click, delete, empty recycle bin) then system restore cant help you as it doesn't monitor file changes or deletion