I've got a DGL-4500 and would like to extend the range. I'm thinking of installing some higher db antenna's to extend the range so it will be able to reach a shop we have 80 yards from the house. I also would like to use my DIR- 624 as part of the extending of the range as well as to setup a network in the biulding as an extention to the house network. What model antenna and how many do I need? The DGL-4500 has three antenna's, do I need to get three? Also how do I connect the two routers, The DGL-4500 which has the internet connection and the DIR-624 that will be used in the biulding to connect three computers there? Is this possible or is there a better way ?