I ran into an issue over the weekend where my mbr was corrupted and had to use my Windows XP CD to fix the mbr. Fixing this record with the Windows XP CD left me without my Linux partition and i started to look into installing grub from windows. Well, that isn't possible as I soon realized, however i did find a solution. Here are the steps used to re-install grub onto the system.
Insert the rescue CD for fedora core 5 and load up into the rescue mode. Then go into your system folder which is normally /mnt/sysimage/sbin. Then type "grub-install --root-directory=/mnt/sysimage --grub-shell=grub /dev/hda"
Aftering doing that, restart the system and grub will be installed back on the system. Hope this helps people who have had the same issue.