Thx for the clarification! Not sure what I typed when trying to uninstall. But then, I don't really care that much, the thing works.
One point. I don't use Xinerama at all or Twinview. I actually wanted to have two screens separate and working before I tried Twinview. I actually had tried to get Twinview going but it failed each time and in many combinations. SO I decided to backtrack and simplify. I am not unhappy with this setup, although the documentation could have been better!
I still think there is a bug in either the nV driver or something's broken in X when it comes to dual head support. Oh well.