Homebrew developer myschoo has released SSR PRX which lets PSP users turn their devices on suspend mode, standby mode or let it reboot. The Suspend, Standby and Reboot app (hence SSR) has been tested and designed "specifically" for custom firmware 3.71 M33.

Rebooting the device or putting it on suspend or standby is done by pressing a combination of buttons. Here's the developer's notes:

* 3.71 M33 (+1.50 Kernel Addon) (should also work on PSP SLIM)

* Installation:

1. Open .RAR.
2. Copy ssr.prx to ms0:/seplugins/.
3. Create blank vsh.txt and add line: ms0:/seplugins/ssr.prx
4. Turn on the PSP and boot to Recovery Menu.
5. Enable plugin from "Plugins" menu.
6. Exit recovery. Plugin has been installed.

* Usage:
o HOME+START = Suspend Mode (also know as "Sleep" mode)
o HOME+LTRIGGER = Standby Mode (shut down)
o HOME+RTRIGGER = Reboot PSP (TIP: Hold RTRIGGER to get into Recovery Menu)

If users have any questions regarding the plugin they are encouraged to go to the PSP Development Forum thread for discussion.