Drop the file into your Emacs library (/usr/share/emacs/site-lisp on
RH9).  Add the following to your ~/.emacs: 
(load-library "selinux-policy")
and make sure you have font-lock mode turned on:
(global-font-lock-mode t)

In Emacs, use M-x selinuxpolicy-mode to enter the mode.  .te files go
into in automatically.