The EASIEST way is to pay for the multiple connections.

But it sounds like you don't want that, but still want easy...

Sadly, if the Edimax and Asus threads seem cumbersome, you are screwed - setting these things up is always going to be cumbersome, but that is the price you pay for trying to save a few bucks on Internet.

The Apple Airport Express might be your best bet if you are an Apple user, but even with that, there are multiple steps involved in getting WiFi shareable Internet.