Redirecting Audio from PC to PC?

Atlantis-Rising asks: "I have two PCs in my standard setup- one is a 1U server (Running windows XP), and the other is a Windows XP Media Center PC. When I purchased the server, I didn't think I'd need a soundcard, and so I made no provisions for this when I was planning my system, and so it has no audio. After buying the server, my main desktop died and I decided to use the server as my main desktop machine, and I'd really like audio. However, my Media Center PC is hooked up to a wonderful speaker set, one that I'd not like to duplicate. I therefore wonder if anyone on Slashdot knows of a way to play the audio from one PC on another? I know about buying a USB sound-card, and I'd rather not do that. I also know that I can use RDP to connect the media center PC to the server, but I'd rather not do that either, for graphical performance reasons. Are there any other solutions out there, Slashdot?"