I just bought a mac pro and an Airport Express Base Station. The reason I bought the base station was so that I could hook up a printer located in a separate room, wirelessly. I am a bit confused by what I see in the product link below: http://reviews.cnet.com/Apple_AirPort_Express_Base_Station/4505-3265_7-30910240.html It looks like ONE unit. Shouldn't there be a transmitter that plugs into my Mac with the receiver plugging into my printer? Unless, the Mac transmits via my Linksys wireless router to the base station plug-in. Can someone explain if I bought what I should have and includes everything I need?