[CentOS] Simple Install of x86_64 CentOS 5 is failing

It gets all the way through the install, and then when it reboots,
grub can't find the kernel.  Grub can't find the kernel because the
kernel was not instaled for some reason?  I looked at the box through
rescue mode and in /boot there is no kernel.

Any ideas what might have happened?

Cheers...james