I've been trying to figure this out for some time but really don't know what to do! Help Please! I am trying to set up a wireless network in a 5 Storey Georgian House with fairly thick walls and interference from cordless phones. My Macbook Pros support N draft. Equipment: 2 Airport Extremes (1 dual band & 1 single band), 1 Airport Express (N), and 2 Netgear Powerline HD 200Mb. Help much appreciated! Thank you!!