Yes I think your right, as I found that these drivers actually started up correctly, (minor miricle) and went straight into my usual high res mode, no blank screen.
So the suspicion is that these are pre 3.66 drivers. I checked, and AGP is disabled, and D3D is greyed out.
Also before the 502 in the file version it says .0327; so they're probably version 3.27...
If you haven't got D3D to work don't worry thats very very common to alot of people, however opengl should be working, you can use the latest nvoglnt.dll file from the 3.81 version with no worries.