Network bridge, but assigned IP address

I am creating a simple network bridge (as described in
http://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/network-bridging.html)
which consists of 5 network interface cards. Function-wise, it's
basically acting as a switch. However, I want to assign an IP address
to the machine with the 5 NICs.

So far without the bridge everything is working perfectly, and my
/etc/rc.conf looks like this:

gateway_enable="YES"
hostname="speedy.i"
ifconfig_fxp4="DHCP"
ifconfig_em0="inet 192.168.0.254 netmask 255.255.255.0"

And I have a NAT (using pf) to allow the 192.168.0.x hosts to directly
reach the outside internet. fxp4 is the external network card. My
other network cards that I want to make part of the internal network
(acting as a switch) are fxp0 through fxp3. So I'm not sure what to
do with my rc.conf. In the handbook it says to add these lines:

cloned_interfaces="bridge0"
ifconfig_bridge0="addm em0 addm fxp0 addm fxp1 addm fxp2 addm fxp3 up"
ifconfig_fxp0="up"
ifconfig_fxp1="up"
ifconfig_fxp2="up"
ifconfig_fxp3="up"
ifconfig_em0="up"

How should I intermingle these lines with my existing rc.conf, and/or
which lines should I remove? I want em0, fxp0, fxp1, fxp2, and fxp3
to be a bridge and be assigned the IP address 192.168.0.254.
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