In my house we have a house router sending net out to all 7 pcs in the house, but now that I have an Xbox (laptop runs on the wireless) I needed another Ethernet cable to run to it.  So I decided to try and daisey chain a router under the house router, so after almost pulling my hair out here is how you do it.  It’s so easy I’m stupid for not seeing it from the start.

1) Plug a patch cable from a LAN port on the Router A (cable modem router) to LAN port on Router B
2) Disable DHCP on Router B

Ya, it’s they simple, sure it kills a port on the router, but it works like a dream, it pretty much just bi-passes the firewall and such on router B so you can file sharing and the such between the 2 routers.  Why did it take me so long to figure this out?  Cause I’m a chode.  Plain and simple.