Well first do the invincibility code shown above this message. Then you go down to the bottom where it's would be a long way up get up there on top of the roof go to your RIGHT until you see another building top. jump off hold the RIGHT button for about 5 SECONDS then stop you should land on another roof go LEFT you should fall into an open window keep following the only path go into the SECOND door beat it and try to go into a locked area and the lock should disappear