Grub 2

mount -t vfat /dev/sdc1 /mnt
grub-install --root-directory=/mnt /dev/sdc
grub-mkimage -o /mnt/boot/grub/core.img /mnt/boot/grub/*mod
grub-setup -d /mnt/boot/grub -v -m /mnt/boot/grub/device.map '(hd0)'

in device.map

(hd0)   /dev/sda

grub 2 commands

ls - list all partitions

Grub

http://www.fedoraforum.org/forum/showthread.php?t=975

Fix grub boot loader

find /boot/grub/stage1

root (hd0,0)
setup (hd0)
quit