My GatewayPC has no awareness of the Airport Extreme
base station I plugged it into
with a cable (LAN port). The Ethernet port, not the
wireless. I thought it
should be able to access the router's internet from the
Ethernet just like
the wireless.The Gateway doesn't have an wireless card installed but it
works when dirrectly connected to the internet through
our cable modem. My G5 can
connect wirelessly however the port for ethernet on the
base station itself will not let my Gateway connect with
DHCP.What should i do?

Am I to understand that you've already verified with
another client machine that the ethernet port on your
Airport is working? Do you have your Airport handing out
DHCP addresses or doing any address translation? If so,
turn that off and try again (if your ISP will issue multiple
addresses). How about trying a static address on your 98
box?
