Nvidia driver unable to find the kernel source tree

[Leopoldo Olmos]

I was trying to install de latest Nvidia driver for AMD64/FC4 and
received the following message:

"Unable to find the kernel source tree for the currently running kernel.
Please make sure you have installed the kernel source files for your
kernel; on Red Hat Linux Systems, for example, be sure you have the
'kernel source' rpm installed. If you know the correct kernel source
files are installed, you may specify the kernel source path with the
--kernel-source-path command line."

I installed FC4 from a DVD iso, and I don't have the kernel source rpm.
Where can I find it?

Leopoldo Olmos