Wow. I just found out how the audio out works and it wasn't what the Dell tech support was telling me.
The audio ports in the back can switch between output and input. In other words, the microphone and audio input jacks will switch to output if you plug the 5.1 cables into it! o.O So cool.
I find it a little irking that the Dell tech support was telling me that the 5.1 output was coming from only the green jack.
Thanks for trying to help cjl.