How do I replace my current wireless router with my new wireless router?

Ok so I have a linksys Wrt54g wireless router, but I msik of it and bought a new airport extreme. Im confuesed. Do I just unplug my current wireless router and then simply plug in the new one and configure it? Or what, What about the computers on my network?|||Try http://forums.speedguide.net/forumdispla鈥?/a>