I install squeeze at sda3 then I install Windows 2k at sda1, grub boot manager removed fortunately I have another PC running squeeze so I plug the hard disk to it and mount it at /mnt/deb and I try the command: grub-install --root-directory=/mnt/deb/boot --grub-setup=/mnt/deb/boot/grub/grub.cfg /dev/sdb it says permission denied though i am root can you help me? Thanks!