My apologies for restarting this thread.  I thought I replied Saturday privately and not to the list.

For the sake of accuracy, let me copy and paste a few notes commenting in particular the path issue I had installing nvidia drivers on SL 4.2. 
1. I installed from atprms repo (only time I use it) the following:

It turns out I needed these:
a  nvidia-graphics100.14.09 (non-legacy)

You must also install a matching nvidia-graphics100.14.09-kmdl rpm, if you want to
utilize these drivers.

b nvidia-graphics100.14.09-kmdl-2.6.9-78.0.1.ELsmp
c. nvidia-graphics100.14.09-libs
d nvidia-graphics-devices
e nvidia-graphics-helpers

2.  I've had trouble using the nxconfig scripts and have hand edited.  On 1 of 2 linux boxes (other was legacy driver) , I had to make the following adjustment...

 I had trouble getting nvidia glx library to load instead of nvidia, so following a web suggestion, I had to link the library:
in directory
/usr/X11R6/lib/modules/extensions
I moved  libglx.a to libglx.aSAV
and linked
sudo ln -sf nvidia-graphics-100.14.09/libglx.so.100.14.09 libglx.a

Bill Lutter