Two questions here 1. If I have a wireless router. Will the airport extreme catch the signal and repeat it? 2. I have 3 Macs, HP USB printer and a lynksys wifi router. Two are wireless and the G4 is ethernet. Currently to print I have to print from my G4 that the USB printer is connected to. If I buy the airport extreme can I plug in the printer to it and print from all computers? Can the G4 via ethernet port on the lynksys wireless router see the printer connected to the air extreme?