2 NICs and an Airport

I am having a bit of trouble getting routing going with a linux box
with RH9 that has 2 NICs and my airport. I can get eth0 active
running cat5 from the cable modem to it but i cant eth1 to get active
with the airport. This is the setup I tried:

Linux Box
---------
a - eth0 - DHCP
b - eth1 - Static IP - 192.168.0.1/255.255.255.0 No Router or DNS
numbers

Airport
-------
c - LAN - 192.168.0.2/255.255.255.0 Router 192.168.0.1
d - Wireless - 192.168.0.3/255.255.255.0 No Router or DNS numbers
Should distribute IPs for DHCP on client machines (192.168.0.4 ->
..255)

Dual Mirror Door
----------------
e - Wireless - DHCP Router 192.168.0.3 DNS 141.233.128.1/141.233.159.2

Lappy
-----
f - Wireless - DHCP Router 192.168.0.3 DNS 141.233.128.1/141.233.159.2

The routers I got from the router assigned to eth0 (the cable modem
routers) and everything else is just trying to get the internal
network going. I have net.ipv4.ip_forwarding = 1 in /etc/sysctl.conf
and I added "GATEWAYDEV=eth0" to /etc/sysconfig/network. When I had
the setup up I could ping to the airport IP from the g4, but when I
try to ping the router ip I would get "ping: sendTo: Host is Down".
Anyone have any insight for me?

PS - I'm a newbie in linux and have been using the RH GUI to set the
eth0 and eth1 settings as they are now :\