[snip] If you boot off "disk 0" and that device is "hda", "grub-install /dev/hda" will install grub on the mbr of your boot device. If your boot device is other than "hda" use the appropriate device name (hdb,sda..etc.) [/snip] >this also works, when you boot from the rescue-cd from fc2? Yes, it does. The grub-install manual pages provide details and some how-to's make use of the technique to re-install grub to alternate locations.