A friend of mine told me about wireless ethernet bridging between two locations and said that would be the way to go!! My mother in law has DSL at her house and it is about 450 feet away from mine and I want to expand her signal to reach me where I am at. My friend said that all I need is 2 antennae's and 2 wireless routers and the cable and it would work?? Is this true and if so how hard is it to install??