Boot Failure

After loading RHEL5 onto a system and then configuring the security in accordance with the NSA Guide, I cannot boot the system. I am getting the error : Memory for crash kernel (0x0 to 0x0) not within permissible range Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block (0,0) I believe there may be a problem with the /boot/grub/grub.conf file. I can boot the system with a Fedora livecd but am denied access to modify the file. Any words of help? Thanks Gene Rye