I have performed many searches here and on other sites about this but I cannot come up with a clear answer. I Have an airport Extreme Base station connected to my DSL modem and every thing works fine. What I would like to do is extend the network to another building, I already have cat 5 wire ran between the buildings and I and am adding ethernet ports in each building. I just purchased an Airport express and I would like to connect it to my existing base station vie ethernet. Extending the range wirelessly is not possible. Will this work? There is a ethernet port available on the AE base station has an ethernet port available. Also I plan on sharing my internet connection between a mac and a PC, right now everytime I connect to my network using my PC the Mac losses the internet connection. Any suggestions on that would be appreciated.