Do any of the Linksys wireless routers Have the capabilites of hooking up an outside antenna? I was thinking of an WRT54GS v4.0. Is there software that would let you use only 1 of the antenna ports? I have a buffalo whr-hp-g54 to an outside panel antenna going 2 miles but would like a back-up router. I used to have a wrt54gx with the 3 antennas but would like to try something different.