Re: NVidia-kernel-2.4.26-1-686 : is it already available ???
You must reinstall the driver when changing the kernel... (or compile the new kernel module separately without reinstalling the libraries). There is no change in the 2.4.26 kernel that I am aware of to make the driver stop working (I have not compiled and installed it on a 2.4.26 kernel however... I may be wrong).
If you did not yet reinstall the driver, run the installer script again and allow the installer to compile a new kernel interface for your new kernel.
"..the triumph of evil is for good men to do nothing."
VIDIA video driver RPMs for Fedora
:: see yum repo at livna.org