To launch, simply load it like you would with a normal cannon. then push the button and step on the pressure leading up to the safe pad and watch! a list of orders to put the TNT in is right by the cannon. to get to the cannon go to the coordinates -320, -65. to find the coordinates, push F3 and your coordinates will be displayed on the first 2 and 3 numbers of the X and Y lines, or simply use Zans minimap! Enjoy! extract and place in the "saves" folder in ".minecraft".