lupin the 3rd posted this step by step instructions. maybe this could help you.
1) download the kernel sources from here:
http://www.kernel.org/
Choose "F" for full sources... the current is 2.6.6
2) open up a terminal and su to root
(#denotes commnad line input)
3) #bunzip2 linux-2.6.6.tar.bzip2
4)#mv linux-2.6.6.tar /usr/src
5)#tar -xf linux-2.6.6.tar
6)#cd /usr/src/linux-2.6.6
7)#cp /boot/config-2.6.5-1.358 .config
8)make menuconfig
9)check "Kernel hacking ---> CONFIG_4KSTACKS" and make sure it is disabled
10)exit
11)make && make modules_install && make install
12) or instead of "make install" you can "make rpm" and install that way
13) reboot into the new kernel
14) install nvidia drivers