I've searched the forums and haven't found anything that would really assist me in solving an issue I have. Minus the roaming wireless network but, as I understand it, that's for multiple airport extremes. A friend of mine has an extremely old house and the walls throughout the house are made of concrete and cinder blocks (or at least looks like cinders). Two stories and about 5500 to 6K square feet. (I forgot to mention huge earlier. I think he said it's considered a fall out shelter as well.) Literally, the walls are a foot to a foot and a half thick throughout the house as well. There are cables (cable tv) ran around the house (on the outside) for tv but, he is not wanting to drill more holes through the walls. I have tried to use those little (I forget the brand name.) nugget looking wireless repeaters through the house but, they never seemed to work. Not sure if it was the hardware not all working together or my misconfiguration (I've been able to do it before in a wood house that was 4K square feet.). So, my idea was to put an airport extreme at the cable box (in an upstairs room) and in every OTHER room (about 8 rooms total, 4 bedrooms up stairs) add an airport express. I read that the signal will drop 25/50% for each "extension". If that's the case, the system I'm trying to get to (down stairs, across the house into the library) will have a very slow, if any, connection (signal) to the 'net. Any recommendation? No drilling, so I can't run ethernet outside, walls are to thick (solid) to drill/fish ethernet through, and the house is huge and spaced out. They currently have 2 - 100' cables (spliced together with a coupler) stretching from the router up stairs, to the iMac in the library. Post up what you might suggest.