FreeBSD = Router, and vice versa

[agent dero]

I guess this is a simple question, but I have never done something like this 
before, so I figure I'll ask. I have been using FBSD for a while, but now I 
need to ship a FBSD server half way across america, and have a newbie press 
the power button, plug in two network cards, and have it work. 
 
I have already setup the two network cards on the machine, both with DHCP, 
meaning when plugged in interface fxp0 will receive via DHCP an IP from the 
broadband provider, and then on interface dc0, the client computers will 
retreive a LAN IP address. I also configured the rc.conf so that it is 
enabled as a gateway. But is that all I need to do? 
 
Help appreciated. 
-dero