How to set up AirPort Express using a Mac?

[lisasmithus]

• A Mac computer with an AirPort card installed (to set it up wirelessly), or a Mac computer connected to your AirPort Express with an Ethernet cable (to set it up using Ethernet)
• Mac OS X v10.5.7 or later
• AirPort Utility v5.6.1 or later
Use Software Update to get the latest version of AirPort Utility

AirPort Express Setup | Apple AirPort Express Setup | Apple AirPort Setup