How do you setup 2 wireless routers to connect with each other not using a cable? One router is an ADSL modem/router and the other is just a wireless router. I need them to setup at a friends house so that they can boost the signal, but since my own home network has only 1 wireless router and not two. I've got little clue on how to set it up. And google isn't a biga help when you type in the word wireless (ADS:()
well, unless one of those routers is an access point, you can't
You could have a dozen routers and it wouldn't help boost the signal. That isn't how they work. If all you need is a wireless connection to a drop on the other side of the house, you can (depending on whether your hardward supports it) configure them to bridge. It's like running a wire, but less stable. Some routers may support this, but you don't need a router for it. Some companies (Buffalo comes to mind) actually produce wireless bridges that do nothing but bridge between two ethernet-capable base stations.
But if all you need to do is boost the signal... get a high gain antenna or two.