how do I go about extending my wifi range? I currently have an airport extreme (5thgen) connected to my broadband gateway but it's in my tv cabinet which seems to reduce my signal. I have an airport express in my loft that links all my media server and backup stuff into the network.* is the best way to buy another airport express and connect it to the extreme via Ethernet? or can it be done utilising my existing one in the loft via wifi?