Hi Chong,

> Thanks, this looks interesting.  The problem with nXhtml mode (and
> php-mode) is that we've had a hell of a time trying to get the copyright
> assignments to get them incorporated into Emacs, and at this point I've
> given up.

Is there a particular reason that multi-mode is not in the list?

http://www.loveshack.ukfsn.org/emacs/multi-mode.el

I reviewed the packages dealing with this problem recently, and this one
looks most well-written, if probably outdated.
And if we believe the copyright notice, copyright assignments are
already in place. Provided it's a viable candidate, I might see what I
can do to bring it up-to-date.

-- Dmitry