hello everyone- i now have an airport extreme 5th gen attached to my cable modem as a router for my home network. everything is on ethernet downstairs (Apple TV, mini) or on 5ghz (ipad2, macbook air) but upstairs my wife uses her trusty imac g5. obviously she can use the same extreme on 2.4ghz, but of course that slows all the other wireless devices to that speed as well. i'm thinking i could get an airport express to extend the network upstairs and use its ethernet connection for the g5. will that work? does anything i just said make any sense? a better way to accomplish this? i am open to your ideas. appreciate the help!!