Install Linux from distribution media, as described in your Linux documentation.
For Red Hat Enterprise Linux, refer to: http://www.redhat.com/docs/manuals/enterprise/#RHEL5
For SUSE Linux Enterprise, refer to: http://www.novell.com/documentation/sled10/
If you are installing the Red Hat Enterprise Linux OS, after installing the OS but before installing the video drivers, run the up2date utility. If you have already installed the NVIDIA video drivers, run the install.sh script after running up2date.