Lockdown allows you to password protect your PSP.
You can also protect the Recovery Menu so that the protection can't be bypassed at all.
Lockdown XMB Style uses the XMB Wave as the background, and is only for the PSP Slim.
Thanks to Dark_Alex for his VLF library, without which Lockdown XMB Style would have been impossible.
Lockdown In-Game will require you to enter a password when you resume your PSP from suspend mode—Useful to prevent other people from messing up your progress if you put the PSP in suspend during a game.
The various Lockdown applications were getting out of hand, so from this update I've consolidated them into a single pack.
Download: Lockdown Pack 2
Tested on 5.50GEN-B