DON'T TRY THIS ON 3.56 or 3.60 !!
APPARENTLY WE CAN'T RESIGN THE LV2DIAG.SELF AND WE WON'T BE ABLE TO SO YOU WILL BE STUCK IN SERVICE MODE AND CAN'T GET OUT.
NOTE : Service mode is totally different from recovery mode.
Service mode requires a usb dongle to be inserted on startup and goes into xmb with a box saying service mode.
Recovery mode is a menu that comes up when you hold the power button