I had a go on a Debian install. So after installing CTKArch next to Debian,
and grub (legacy Grub that CTKArch sticks to for its lightness), I restored
Debian Grub2 using the rescue mode of the Debian install CD. Debian takes you
by the hand in this rescue mode. Quite amazing and way much simpler than
using the Ubuntu LiveCD as explained there (in French):
http://doc.ubuntu-fr.org/tutoriel/comment_restaurer_grub
After logging into Debian, I simply did # update-grub
then rebooted, and right-o CTKArch is there and runs fine.
I made a copy of the new grub.cfg to see what CTKarch needs to boot with
Grub2.
BTW, CTKArch is a configuration of Arch on an installable Live-CD. Very light
and pleasant. Worth a try.