Did you try the Web interface?
Point your browser to [link|http://localhost:631|http://localhost:631] and click away.
I've found that sometimes it offers more options than the GUI frontend.
Other than that, if you really plan on hand-configuring this, be sure to read the man pages to get a good idea of how the file is laid out and what options are available.
Otherwise, dive right in. (Back up your old files first, of course.)
Tom Sinclair
"While I'm still confused and uncertain, it's on a much higher plane, d'you
see, and at least I know I'm bewildered about the really fundamental and
important facts of the universe."
Treatle nodded. "I hadn't looked at it like that," he said, "But you're
absolutely right. He's really pushed back the boundaries of ignorance."
-- Discworld scientists at work
(Terry Pratchett, Equal Rites)