I want to get my headphones and stereo system working as separate devices in Windows.

Hey guys, I need some help with my audio setup. I'm using a Gigabyte H310M S2H 2.0 motherboard with Realtek HD Audio, and I want to get my headphones and stereo system (connected to the green and blue jacks) working as separate devices in Windows. Right now, both show up as a single device. Does anyone know how to make them show up separately, or is there a setting I'm missing?