Hi all, I apologize in advance for the rather silly question, but I'm getting a bit overwhelmed with all the info out there, and just need a straightforward question. I would like to share an internet network with my neighbor across the hall, but the signal strength does not reach my apartment (actually, her network appears for a few seconds when I first turn my Macbook on, then it disappears). She suggested I get some kind of wireless extension-- is this something that the Airport Express does? And, if so, does it connect to her modem, or do I plug it somewhere in my apt.? Is it compatible with a Comcast modem? I have also heard of an Airport Express Base Station-- is this something I would have to purchase as well? Any clarification would be so appreciated! Thank you.