Using an airport express to wirelessly connect speakers to the network

[Undecided]

I have an extra wireless router, the original airport express, and I'd like to use it by putting it in another room and connecting speakers to it. I did this before, with the airport express connected to the network over its ethernet port, and that worked great. How do you do it wirelessly? It's basically putting it on the network in reverse - instead of clients connecting to it over wireless, it's a client connecting to the network wirelessly. How do you do that?

[digitalmac]

Wirelessly posted (Mozilla/5.0 (iPhone; U; CPU iPhone OS 3_1 like Mac OS X; en-us) AppleWebKit/528.18 (KHTML, like Gecko) Version/4.0 Mobile/7C144 Safari/528.16)

Didn't quite get what you are trying to say. Are you trying to have your AirPort Express to join your existing wireless network and then stream music to it's connected speakers?