Well, I've half-way answered my own question.
1. To use apt-get, you need to do an apt-get update first
2. Gnome and knoppmyth don't get along. It might be possible to load gnome on it, but it doesn't work well out-of the box.
For those who might be interested, gnome will not allow you to log in as root, and for some reason prevents the knoppmyth user from accessing... well, pretty much anything.
I tried to complete the instructions here:
http://www.gizmolabs.org/~ecronin/w/Main/MythBox
for setting up wpa2 under knoppmyth without success. Is there a simple network card manager I can download? Do I need to bite the bullet and go back to OpenSuSE?