We went two hours over the time limit, used all the hints, looked the answer up on the internet, still didn't get it, gave up and sold the game off in anger.
Madness string 85915
The reality is I kinda like the rock. I don't see the need for a piece of hardware or a program when the rock works fine. There is something to be said for simplicity and I don't think its gonna get any simpler than a rock. It's basically an on/off switch.