need AirTunes/iTunes script

I need to know the UI element name for the pop up menu in itunes that lets you select which remote speaker you want to play through. It is at the bottom right of the itunes window. I need to make a script that will let me select different speakers, but I did not know the name. Can anyone help?

This is a script that interests me as well. I can open the remote speakers window but I believe it will require GUI scripting to toggle speakers on and off. Any ideas?

tell application "iTunes"
	--activate
	set visible of window "remote speakers" to true
	set {X, y} to position of window "remote speakers"
	tell application "System Events"
		tell process "iTunes"
			-- do something here
		end tell
	end tell
end tell