[stunnel-users] Starting stunnel automatically on OS X system startup

Does anybody have a solution that will start up stunnel on OS X bootup? I've installed stunnel on a Leopard server (OS 10.4.5.4) to make a smtp SSL relay work (and it works fine). The problem is, we'd have to type in /opt/local/bin/stunnel on the command line every time the server is rebooted. Rather than having to create a /Library/ SystemStartup/diretory_structure_with_plist_etc., has somebody done this, and can lead me in the right direction, in the interest of time? I've just run out of time, and I kinda think that somebody must have done this already.

Thanks!

Allen