i am using only the drivers, NOT the Liveware, and after a quick check the black plug doesn't work at all. Guess you need the livewire to enable them. Makes sense, tho- they are supposed to be Surround outs, you'd need some kind of software going to decode a signal for the black from the fronts.
hmm, what is this CD I used to test it with? H to the izzo? Aww yah