Try this. This worked for me when I ran RED HAT 9.0
Go to consol. <quit the X server>
<you must be root or su>
Go to were you put the latest NVIDIA 5336 driver.< cd /root/bla/bla>
once there. type; sh NVIDIA-Linux-x86-1.0-5336-pkg1.run --add-this-kernel
After that is done type;
This should build and install a driver for your kernel.
Make sure to edit you X11 config. file per Nvidia's readme file.
replace "nv" with "nvidia" under the driver section.
make sure to comment out < # > the dri.
after this save it and re-start X.
To remove the MESA libs. that may be causing a problem.<they did for me>.
At a shell command type;
rpm -e --nodeps XFree86-Mesa-libGL
You should be good to go. Let me know if this helps.