How do i extend airplay to stream music at the same time to AEX and ATV2

Question

I have a new ATV2 and an AEX, my macbook, 2 Ipod touches and an Ipad2.
I figured out how to setup my ATV2 and airplay through my macbook and my touches. My ATV2 is in my living room on a Yamaha 6.1 receiver with 2 channels. I have 6 speakers in my living room on channel A and a speaker in my bathroom on channel B.
So....I decided to grab an extra Bose speaker and bring it to my foyer/kitchen and hook it up to my AEX since i cant hear the music too well when im cooking or in my office from the speakers in the living room.
I setup the AEX to connect direct to the speaker. When Im on Itunes (either mac book or touch) i only get two options to airplay, AEX or ATV2.
My question: How do I extend airplay to stream music on BOTH AEX and ATV2 with the same music at the same time?
Please and thank you!

Answer 1

As you are already aware both the 802.11n AirPort Express Base Station (AXn) and ATV2 are AirPlay "speakers." When both devices are properly connected to your home's wireless or wired network, both should show up in iTunes as in your case. Also the iTunes AirPlay speaker selector should provide you with an option to choose multiple speakers. As a minimum, you should see: Computer, the AXn, the ATV2, and the Multiple Speakers options. Is this not the case?