--------------------------------Install GRUB on a partition (Help) -----------

With this option you will INSTALL GRUB on a partition boot sector.
You should not choose a Windows partition or a partition that doesn't 
already have a boot sector because you may loose all its data.

After you've restored Grub on there, and if the partition is a primary one,
you may need to activate it for it to boot.
Check the Activate Partition option from Gnu/Linux menu.
