Open port 80 on boot without running "personal web sharing"?

[splitpea]

I'm running a local Apache instance installed using MacPorts, and need other computers on my network to be able to reach it. The following command seems to open up the port I need, but how can I run this on boot?

sudo ipfw add 02080 allow tcp from 192.168.1.1/24 to me 80

Thanks!

[chown33]

man launchd

man launchd.plist

[splitpea]

Thank you!