Here's the problem: I have an aspire X-Dreamer II case, which has a green 1/8" jack in front and a red, for stereo sound and microphone, respectively. For these, inside the case it has two cables with a green and red 1/8" male (to go to the mobo, I presume). Right now I don't have those connected to anything because I don't know where to connect them. I have 5.1 speakers, however at night I like to plug in my headphones so it won't wake anyone up. What I want it to do is what my stereo does...Where once I plug my headphones in, the speakers stop playing. However I'm not sure how to accomplish that, especially since my speakers are 5.1 and use three 1/8" jacks. I'm assuming this is a connection problem with the motherboard. What can I do?