Once your AirPort Extreme is set up correctly, the AirPort Express is really easy to get working. In fact, you probably won’t even need to do any custom settings at all. Once I had the Extreme working correctly, the Express locked right in to it with no problem just like the installation docs said it would do. I have my Express set up to “Join an existing wireless network” but you may choose to set it up differently. Here’s the Manual setting screens though, just for your reference.

Like with the Extreme, the most important screen here is the “Wireless” settings screen. You just have to be sure you are set to “Connect to a wireless network” and have the connection information you setup earlier all keyed in correctly.

The “Internet Connection” screen is like the Extreme, I have set everything to automatic.

All you need to do on the iTunes screen is give your “speakers” a name. This name will show up in iTunes when you are connected to your wireless network and you can play your iTunes through your network on another set of speakers. You can even specify a password if you like. I don’t have one set up, personally, because you would have to know my network password to connect to the wireless signal and thus the Express, so I didn’t feel the need to set up another password inside the network for my living room speakers. I could understand setting a password if you have multiple Express units in your house though.

I don’t have anything hooked to the USB and the Advanced tab is nothing special either, but you should get the idea.

Hopefully this tutorial has been informational and helpful. I don’t assume my settings are perfect by any means, but this definitely was something that I had to fight with for a while until I figured it out and that’s the point of this site so there you go! Let me know if you have any questions or even suggestions on different settings I should have set.