Boot into your linux box with your boot disk, go to a console as root, and then go to the grub directory (/boot/grub, I don't why, but I always do this from this dir
) then issue the command #grub-install mbr. This should install back grub in the Master Boot Record of the computer. Try to do this, *before*
putting back your Tivo drive, just make sure you can boot normally. Then re-do your steps if you really wanna tweak it.