"I need to reinstall GRUB because I reinstalled windows overwriting my MBR (both OS's on seperate HDD's)."
Use a rescue CD to boot into FC3 (or a boot floppy if you have one). There is a rescue CD mode on your FC3 install CD. Once in your FC3 system edit /boot/grub/grub.conf to reflect your current OS setup. Then run the command:
grub-install /dev/hda
The grub-install command will place the grub boot loader on your MBR.
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Steve Stites
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