In http://lists.fedoraproject.org/pipermail/spins/2010-May/001101.html Dan proposes some changes to live-base.ks to help make maintaining his kiosk.ks simpler.
Mads Kiilerich had a comment on it in: http://lists.fedoraproject.org/pipermail/spins/2010-May/001113.html
It would be nice if someone could work with Dan and try to get an acceptible patch so that kiosk.ks could include live-base.ks and take advantage of updates without having to copy the into kiosk.ks.