I'm hoping to get some help extending my wifi range. Googleing brings about a lot of conflicting opinions. So I live in a guest house that's about 150ft from the main house and the 2wire gateway wireless router. We have one ethernet cable running underground into the guest house. Now, my macbook and iMac pick up the signal without any problem, but my Apple tv and Xbox weren't doing so well. So I got a "splitter" (I guess it's called) that allowed me to plug in that one ethernet cable into it and run 4 more ethernet cables in the guest house. So the Apple tv and Xbox and okay now. However, my iPhone and iPad can't obviously benefit from the ethernet and they just barely pick up the wifi signal. So my question is this: can I get another wireless router and plug in an ethernet cable into it so that the wifi signal is strong in the guest house? Do I need some special kind of router, like an access point or something? Can I use an Airport Express to do this with a 2wire gateway router? Would it work okay, and be easier, if I put an ethernet cable into my iMac and just shared it's internet connection? Any and all opinions appreciated.