If you mean like a hidden switch or something, there was a member who had quite a thread going on about something simaler, he wanted to have a set of like 4 or 5 switches that had to be in a certain sequence to be able to start his explorer.
Actually come to think of it, I think it was to replace having to use a key. He wanted a push button ignition, but not just a "get in and push the button"
Ill try and find the thread and post the link