ipfw firewall help

[Daemon]

I'm trying to build a firewall from scratch using man ipfw and what I
can find on the net.  I'm doing bandwidth shaping and I'm not quite sure
where it goes as far as rule numbers.  From what I can see, it matters
and I'd like to do it right.  I'm using an OPEN firewall with NATD
because I'm on cable broadband with a static IP.  Here is what I have.

00010   52   2446 pipe 1 ip from 172.16.140.0/24 to any xmit re0
00020    0      0 pipe 2 ip from any to 172.16.140.0/24 recv re0
00050  274  24955 divert 8668 ip from any to any via re0
00100   50   5642 allow ip from any to any via lo0
00200    0      0 deny ip from any to 127.0.0.0/8
00300    0      0 deny ip from 127.0.0.0/8 to any
65535 4658 547779 allow ip from any to any

The actual rule set for the bandwidth shaping is:

# Traffic Shaping.
# oif="re0"			# ${oif} Public Interface.
# iif="re1"			# ${iif} Internal nic.
# iip="172.16.140.0/24"		# ${iip}

${fwcmd} add 10 pipe 1 all from ${iip} to any xmit ${oif}
${fwcmd} pipe 1 config mask src-ip 0xffffff00 bw 35Kbits/s queue 40Kbytes

${fwcmd} add 20 pipe 2 all from any to ${iip} recv ${oif}
${fwcmd} pipe 2 config mask dst-ip 0xffffff00 bw 4000Kbits/s queue 40Kbytes

I've found lots of stuff on "how" to set it up but I can't seem to find
anything on where the rules go.  Any help would be greatly appreciated.

Regards,

Mark