In our old house we have very thick walls and I needed to boost the signal strength between my wag54g and WMP54g. The way I did it was simple. Either take some card board and cover it in thick foil and tape it to the aerials and curve it so it points towards the PC you want to boost/router. Or buy some Aluminium pie dishes (around 50p for 10 from supermarket) and tape them to each anttenna (sort of like a satellite look) pointing to the PC which needs the boost. If taping one to the aerial at the back of your PC is awkward then find the place on the wall directly behind the PC/Antenna which catches the signal best and then pin it to the wall in that place. This gave me 2 extra green bars. Of course if you have another PC which is behind the dish the signal will not be as good to that PC. Hope this helps some people. It certainly helped me get thru those old thick walls!