IPFW config

[SigmaX]

Heya;
I have a FreeBSD 5.3 server that I access over SSH.  I followed the 
handbook guide to loading the ipfw kernel module to setup a firewall.  I 
made the mistake the other day of loading the firewall, which defaults 
to block all, and rebooting, so I couldn't get into the system again 
(Had to drive in and fix it :-P).  Anyway, what I need to know is how to 
edit the ruleset manually BEFORE enabling the firewall.  I need to set 
the rules, then load the kernel module, not vise versa.  I've never 
dealt with ipfw without webmin, so I need some explicit answers :-).
What I need to do its this:

Set IPFW to allow traffic on ports 80, 10000, and 23 (That's the default 
SSH port, right?)
Then start IPFW with the kernel module (I know how to do this)

    Thanx,
         SigmaX

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