Setting primary executable instance

[Tim Johnson]

I've installed emacs 24.

If I do 
which -a emacs

I get 
/opt/local/bin/emacs ## New emacs 
/usr/bin/emacs       ## Old emacs

If I do 
which emacs
I get /usr/bin/emacs ## Old emacs

question :
can port switch the precedence so that invoking 
emacs
gets me the new (macports) version and without overwriting the
original?

Or do I have to do something like backup the 'old' emacs and a
symlink?

thanks
-- 
Tim 
tim at tee jay forty nine dot com or akwebsoft dot com
http://www.akwebsoft.com, http://www.tj49.com