if what you are seeing is
then you moved things around with the added drive
reorderd cables ? probably
it has been years since i used the fedora 8 rescue ( install dvd or the first cd - 1 of 6 )
google reinstalling grub and write it down on paper the instructions ( like this part "find /boot/grub/stage ")
http://wiki.linuxquestions.org/wiki/GRUB
and believe it or not but the ArchLinux page is very good
https://wiki.archlinux.org/index.php/GRUB
http://www.unixmen.com/linux-tutoria...reinstall-grub
then pop in the dvd and after you run " chroot /mnt/sysimage"
reinstall grub
or undo what you did with the hdd cables