Werejag is 100% correct, now with that said, here's a tip that might get you going.
I have a 2 Slot CMVS and a Neo CD hooked up to a Boston 5.1 surround system via RCA jacks for stereo. This system runs on optical or coaxial, and both of this signals produce true 5.1 surround sound in either Dolby, Pro Logic, or DTS.
Now when I play my Neo CD I can choose wether I want to run it as a 2 channel source, or I can convert the stereo signal to 5.1 sound and believe it or not there's a hughe differentiation of the speaker channels, you can most defenately pick up different waves coming in specially with the Neo CD, I play the soundtracks just for the fun of it.
SO I guess what I'm saying is that you can get some sort of surround sound if you have the right 5.1 amplifier, other brands have been a bit faulty except for sony that I know of.