You can customize zephyr-mode in many ways. For a few ideas, see the sample zephyr setup.
The current version of zephyr.el is available in
/afs/cs.cmu.edu/local/xemacs/common/omega/lisp/local-pkgs/zephyr.el
See the description of what's new in version 2.2 (the last round of
really substantive changes).
If you would like to be put on a mailing list for announcements and
discussion of zephyr.el, send email to Darrell.Kindred@cs.cmu.edu. Zephyr.el was written by Scott Draves, with contributions from Todd Kaufmann, Mark Eichin, Nick Thompson, Hank Wan, Darrell Kindred, and others. If you have questions about zephyr-mode or suggestions, contact the current maintainer, Darrell.Kindred@cs.cmu.edu.