modrobert writes: "Looks like the hidden system menu trick can be used on PS3 and PSP as well (not just PS Vita). Triggered by: Go to Settings > System > System Information. Press simultaneously R1 + L1 + dpad left + square for a few seconds. Release those buttons then immediately press the start button (and keep it held)."

http://www.eurasia.nu/modules.php?na...ticle&sid=2936