DRIVER INSTALLATION
6  Select Yes when the Kernel Interface window displays.  
When the installer is run, it will determine if it has a precompiled 
kernel interface for the kernel you are running. If it does not have one, 
it will check if there is one on the NVIDIA FTP site and download it.
7  Select OK to compile a kernel interface. 
If a kernel interface cannot be downloaded, either because the FTP 
site cannot be reached or because one is not provided, the installer 
will check your system for the required kernel sources and compile 
the interface for you. You must have the source code for your kernel 
installed for compilation to work. On most systems this means that 
you will need to locate and install the correct kernel source, kernel 
headers or kernel development package.