it was taught to me by larry jennings almost 20yr. ago i saw the move used
again some years later who said he to learned it from jennings i dont know if
it is his or not.i have not seen it in print, but if i ever find it will let you know.
i have to put a multiple user contro software in a school with more than ten computer, so each user can have his or her account and all to be contro by admin.