Hi, I would like to know how can I extend the coverage of a Airport Wi-Fi network. I heard that Airport Extreme can "daisy chain" Airport Express to extend the coverage, but I am not sure if this is true or will it work in my environment: I have a Asus WiFi router in my living room, and I am using iMac in my bedroom. I have LAN cable extended to my bedroom so my iMac has no problem in accessing Internet. But my iMac cannot log on the Asus Wi-Fi network because there are concrete walls. So my question is, if now my iMac cannot even use Wi-Fi, would the Airport network work for me? Many thanks.