Network Config

[JDK]

This is sort of off-topic, as it isn't specific to distro,
but Fedora happens to be what I'm running at the moment...

I'm have Fedora Core 1 Test Release 3 running nicely on
my home network.  I've decided I'd like to use my Linux box
to try and filter internet access for a PC for my kids.  My
theory was to install a second nic in my linux box, and then
setup squid, and probably Dan's Guardian.  I'm fairly
confident that I can get the software working once I get the 
connectivity, but I've not much of a network guy, and have
not been able to get it all talking.  Here is my layout:

                      cable
                      modem
                        |
                        |
            ======== router ========
           /       |        |       \
          /        |        |        \
        Laptop   X-Box    Linux      WAP
                            |
                         Kids PC

I was thinking I could just slap the second nic in, leave
everything set as DHCP, and be along my happy way.  No joy.
I got kicked into Kudzu on reboot, and it correctly found and
config'd the new nic, but eth1 fails to start.  I tried to
switch it to static IP, and then could not get network on 
either nic.  I got internet back when I disabled eth1.  I
can't get the Kid's PC to get an IP in either scenario.  Can
someone tell me what the network settings should be for eth1
in this type of config?

Thanks in advance!
jdk