Had a disaster with XP which meant a re-install and lost GRUB. For some reason the Repair Installation on the Suse 10.3 install DVD would not start, so I used my PartedMagic 1.9 disk instead.
You can get it from here - http://partedmagic.com/wiki/PartedMa...in.PartedMagic
The latest version is 2.1 and it can be burned to CD or USB.
All I had to do was boot from the CD, and open the terminal, then use the commands from above. This is a laptop with one drive, and Suse is on hda4 (hd0,3)
root@partedmagic ~# grub
grub > root (hd0,3)
grub > setup (hd0)
grub > quit
root@partedmagic ~# reboot
Got an error 22 the first time because I typed (hdo,3) with letter O instead of figure zero!