This is probably a dumb question: my apologies. I've got an imac in our back house (converted garge/studio) which houses all the music, served up to all the other macs in the house via the airport express, which is in the front house, as that's where the internet comes into the house. It all worked fine, except the imac in the back house kept falling off the network. I suspect it was interference etc. regardless i decided to get the netgear devices, called Powerline HD adapters, which allow you to use the house ac wiring to connect thjrough ethernet. I've been running a home airport network forever and know nothing about ethernet, setting it up etc. I've got the airport connected by ethernet cable to the neatgear box, which is plugged into the ac in that room, and the imac in the back house connected by ethernet cable to the netgear box, plugged into the ac in that room. What I can't find is how to choose ethernet rather than Airport for the iMac to connect to the airport??? The airport will still be talking to all the other macs in the house wirelessly, and sending music out to all of them as well. I don't want to touch the airport network, as that will still be operating. Do I have to set up an ethernet netowrk or something? thanks!!