OK, so I am going to be moving to an apartment complex that has free wifi. They have transmitters that send it out and I'm trying to figure out how to make this work for me. Here is what I am thinking: Add airport (either flavor) and have it join the wireless network at the complex. But I'd like to have my ATV and 2 macs on the airport network and use that as a gateway to the internet via the complex's wifi. Is that possible? COuld I set it up so that everything behind my airport is not accessible to anyone outside?