Are you saying you want to stream the music from the empeg or use the empeg to stream from something else ?

I believe he is staing he wants to use the empeg as if it were a Rio Receiver, having it play streamed audio coming from another computer (or a Rio Central) over the network.

The other side of the coin, having the empeg be a server for Rio Receivers, is a totally different issue. There's even a FAQ entry on it.