ive tested it earlier in a psp3000, and here are my findings after enabling the plugin,

- by gen vsh menu, when you press reboot, it reboot back to the sony start screen, when you press shutdown, its only like in sleep mode, then after you press up the power switch, it just like reopening psp from hybernation

- by switching the power switch to full shutdown, then opening again, the hen will be gone, so you will reenable the hen again, lol

-haven't test when removing battery then opening it again, but maybe it will be the same scenario as with the power switch,

so as schmilk says, this plugin is not useful or helpful enough for the shutdown in hen ( i thought first the feature will be also with power switch), I've recommend installing Hold plugin for the psp's sleep mode, as it preventing not accidentally shutting down the psp when opening from sleep mode and loosing hen