Got it
Thank you ujjwal! I searched searched several times, but unable to locate this. Now found it with your help.
I think there is a tip about this in the Linux tips and tricks sticky ...
Anyway, to start with, you need to boot into a linux environment, so that you can reinstall GRUB. Any bootable floppy or CD will do, but if your distributions CD has a rescue mode (generally accessed by typing "linux rescue" at the prompt) its better. Redhat does have one, so that makes the job easier.
Once booted, RH will automatically mount your partition on /mnt/sysimage (you may to specify the partition or distro to rescue), but we need to make that directory as the root or '/' directory, so you can type
Code:
chroot /mnt/sysimage
Now install grub on the MBR
Code:
grub-install /dev/hda
Now you should have grub back Smile