2003 has terminal services (remote desktop) which is what I think your on about. It doesn't have this for free though as you need to buy client access licences and be running a licence server. The server would do all the processing for any applications running this way. By its nature the server sends a compressed stream to the remote machine. This means that sound and video is horrible and not what you want to be doing at all. There are other technologies that would be better but ultimately you would be better off just running a file server and running video and audio locally.