Streaming Music to 2 pcs at the same time!!!

Hi Guys does anyone know of a way to play a playlist one one pc whilst listening to it on the machine your streaming it from so they are both in sync.
I can stream to another pc but can't find a way to listen to the same stream on the machine I am streaming it from if that makes sense.
I have windows 7 on all our pc and they are hard wired to a new computer room I have just finnished we have three ethernet points in other rooms and pc's connected to them all what I want to do is play a play list on one in the computer room and be able to hear it on one or all of the others at the same time, not much to ask a but I can't find a way in windows 7 to do this or a program that will do it for me.so if any body has an answer I would very much appreciate the help I do not want to hard wire a sound system through the house when there is a perfectly good sytem already in place

Hi

Have a look at this thread

Regards

thanks for the link I have downloaded the programs and I am in the process of trying to set it up fingers crossed