Re: dumb question on nView
The nvidia Linux driver does have a control panel of sorts, nvidia-settings, however it does not currently allow you to make the types of X configuration changes you are alluding to.
You will need to edit your xorg.conf or XF86Config file to setup TwinView and/or Xinerama, if you wish to have a multi-headed setup under X. The NVIDIA driver README ( /usr/share/doc/NVIDIA_GLX-1.0/README.txt ) provides instructions on how to setup TwinView. Setting up Xinerama is not nvidia driver specific.
If you're having problems please generate and attach an nvidia-bug-report.log for review.