How do I set up live for XBOX 360?

[ClubChamp04]

I have a a modem and router setup and it says I need 3 ethernet cables to connect. The computer and XBOX are in different rooms so I have no idea how I'm supposed to get the router hooked up to the 360. I'm sure I have no idea what I'm doing [img]/images/graemlins/tongue.gif[/img] but any help would be appreciated.

Will connecting my laptop and XBOX via the ethernet cord work?