[gentoo-user] Sharing an internet connection

[Grant]

I travel with a strong external antenna for picking up faint wireless
signals.  It works great, but my girlfriend struggles to connect with
her built-in antenna.  I do have a travel router (D-Link DWL-G730) so
I'd like to be able to do something like this:

WAN->my laptop->travel router->girlfriend's laptop

I use wicd and I'm not sure how to go about this, especially since my
laptop DHCPs for an IP from the WAN so I'm not sure how to define the
gateway for the travel router when following this:

http://www.gentoo.org/doc/en/home-router-howto.xml

Is there a simple way to pull this off?

- Grant