What the last post said will definately work...however, you might want to check out a possible problem with this idea before you get too excited...
As far as the computer goes, what soundcard you have will determine whether or not the 'line-in' on your computer is actually a stereo input or not. With a stereo adapter connecting into it you WILL get all the sounds, but it will not be recorded in a true stereo sound.
So, somehow you will need to make sure that your computer does take a stereo input. I had to go through an ordeal to get this information when I first started recording through my computer, so you may even need to call the manufacturer of your computer or check your manual.
Hope this helps...and you can always check back here-everyone is great at helping and giving opinions here.