I have a D-Link Extreme router, and the wi-fi has issues with my Macbook and such every so often and it drives me absolutely crazy. But I have 2 wired computers and a Xbox 360 that never have a problem plugged into the router via ethernet. I was wondering if I bought a Airport Express and plugged it into the 4th port of my router rather then into modem would it have enough juice to transfer the wi-fi? I don't want to spend the extra money on a more expensive router for some plugs and wi-fi if I can still use my router for wired and send a wire to the Airport for wireless. Yet I don't want to spend the money on the Airport Express if it can't be used like that like some other routers can.