Lockdown allows you to password protect your PSP from prying eyes. It also protects the Recovery Menu so that the protection can’t be disabled without considerable effort (or by unbricking).

Changes:

Now fully supports PSP Phat and PSP Slim. Uses less RAM as well, so it shouldn’t conflict with other plugins. If you have too many plugins enabled for VSH mode it may not work.

http://forums.qj.net/showthread.php?t=141060