The stock soundcard on my PC had a Line-Out. The headphone out on my machine was actually on the speakers. Plug the powered computer speakers into the line-out and viola.
An extension of this, and I've been doing it for a few years now is to run the Line-Out from your PC to the AUX input on your receiver. I used a 1/8" TRS>RCA Y-Cable:
http://www.radioshack.com/product.asp?catalog%5Fname=CTLG&product%5Fid=42-2551Last year, when I got a digital pre-amp, I also bought a Zoltrix so I could go optical out from the PC, but I haven't been able to get that working quite right - I can't get 48k playback...
BUT (huge but here), my PC makes a lot of electronic noise and I can hear it when I playback thru my PC. I used to think it would be convenient, etc. to pop a SHN CDR into the CDRom and play with SHNAmp thru the stereo, but I find it to be a PITA with all the digi-noise...
However, when working right, it rules. I can switch between dozens of shows in MP3, SHN. FLAC, whatever without any pauses or disc changing, but I'm slowly starting to burn my listening to CDR for playback rather than using the PC>Stereo route...
Good luck with it!!!
Terry