DVD on Kubuntu
A site for Kubuntu specific packages is the Kubuntu archive at the PLF.
http://wiki.ubuntu-fr.org/doc/plf
Add this to your sources list.
deb http://packages.freecontrib.org/ubuntu/plf/ breezy free non-free
deb-src http://packages.freecontrib.org/ubuntu/plf/ breezy free non-free