After the restore completes, quit out of the PBA client to the console. If you already restored your hard disk, you can boot up the PBA client again, and exit the client to the console. For these instructions, I will assume that your only linux is /dev/hda1 and you do not have a separate partition for /boot. If you have a separate partition /boot, mount it instead of the partition mounted to /.
Run these commands:
# mkdir /root/tmpmntReboot the system, and eject the PBA client CD to boot from your hard disk.
# mount /dev/hda1 /root/tmpmnt
# grub-install --root-directory=/root/tmpmnt /dev/hda
# umount /root/tmpmnt
I will do this automatically in the next release of PBA.