adding nodes to a network

[iain d broadfoot <ibroadfo@cis.strath.ac.uk>]

I have a router with two machina wired in, and my laptop on wireless. 
what kinda stuff do i need to do with dhcpd on the laptop to connect a 
machine (wired) to the laptop and have it as part of the bigger network?

or can i skip dhcp and just iptables it?

i've done a fair bit of googling, so a quick package name or search term 
that'll get me what i need would be lovely.

cheers guys,

iain

ps:

box1-->router<--box2
       /
      /
laptop (wireless)<--box3

box1, box2 and laptop are dhcping from the router.