I currently have a shaw wifi modem/router in my garage, which is on the middle level of a three storey house. The modem/router is in the garage because it is hooked up to the cat5 network cables wired into the house. Unfortunately, the concrete in the garage makes wifi throughout the house terrible. What are my options for inexpensively improving my wifi signal strength throughout my entire house? I imagine I might need to plug some kind of extender/access point/etc into one or more of the cat5 outlets in my house, but don't know what to get or what would be the most sensible solution. Please help.