Steve,
There are several reasons why you can't get it to work:
a) thre is more than one library required.
b)ME is protecting you from yourself (and viruses). It restores system libraries to their original states whenever it detects that they have been modified or are missing.
c) the MS 1.1 driver is what is used when you turn off hardware acceleration in the Display Manager, so you shouldn't delete it.
Solution: install the full Nvidia driver kit by running their all-in-one driver installation program. Don't try to install the drivers and libraries individually by hand.
A recent driver installation program should have been included on a CD that came with your graphics card. It's a single 13 MB program, not individual driver files. Either 40.72 or 41.6 should work fine.
Alternatively, go to the Web page
http://www.nvidia.com/content/drivers/drivers.asp and download the most recent Nvidia installation program from there. Alternatively, you should be able to get a copy from the Web site of the manufacturer of your particular card. Don't get it from anywhere else: you don't know what you might be downloading.
Select Graphics Driver, GeForce and TNT, Windows 95/98/ME and Go
Then click on one of the 4 download sites, Accept the license, and then specify a reasonable download directory. After the download has finished,
run the installation program.
I hope this helps a little.