My vote is for the current LTS revisions only (lucid and precise, the
first being outdated for master i guess, not sure). Their 2-year
release cycle seems to be enough for having a fair recent version of
the required libs. So, this files might need being updated/deleted and
new ones created:

INSTALL.ubuntu
INSTALL.ubuntu.lucid
ubuntu_maverick.packages (delete or at least rename!)
ubuntu.packages
ubuntu-pkg-check.sh

I propose:

INSTALL.ubuntu.lucid
INSTALL.ubuntu.precise
install_misc/ubuntu_lucid.packages
install_misc/ubuntu_precise.packages

+1 from me.

Regards,

Jared