Comparing the log files from the nv & nvidia attempts - what pops out is nvidia sets the ModulePath to "/usr/lib/xorg/modules/extensions/nvidia, /usr/lib/xorg/modules". modules directory only has extensions and drivers folders, while the nvidia directory mentioned only has libglx.so... The nv Xorg log file is "/usr/X11R6/lib/modules"...
I wonder if it would work to sudo cp those files to where it looking? Probably best to find out where the ModulePath is getting changed/set. Question is, how is a Win refugee to do that?
You can set that in the xorg.conf file in the Files section
If you do a:
# man xorg.conf
You'll have all the info on xorg.conf you need. Set the ModulePath variable the same way RGBPath was set but substituting the required directories in a comma-separated list.
Michael