I have currently an Airport Time Capsule as a router in my house. Its the only thing I have. The 2TB one. Problem is , I can't get a good wifi connection to the other end of my house. So I bought a refurbished Airport Extreme on Apple today. Was hoping to extend the wifi signal. Can I do that? Or did I buy the wrong one, maybe I should have bought the Express one? Anyways, if it is possible to extend the signal with the Extreme. How do I set it up? I know I should use Apples built in utility on my Mac. But where do I set it up. What do I do? Totally new on this. I haven't had the Time Capsule for very long either. Any help would be great. TIA.