Put into your init file (.emacs or .xemacs/init.el or personal.el):
And probably something like
(add-hook 'linmag-mode-hook '(lambda () (turn-on-font-lock)))
Should work in XEmacs and GNU Emacs. I've only been using it in GNU Emacs lately, though.
I havn't been using this much since my first article series was rejected so it might not live up to your expectations. But I think this is the only thing available at all. I will use it for the next articles I plan to submit to the Linux Magazin so there may be improvements down the way...