Custom firmware / Semi brick recovery to 1.5 downgrade

This is only for custom firmware , if u don't have custom firmware or simply wanna unbrick any psp see HERERecovery mode is one of the most useful features of custom firmware - as it makes your psp almost indispensable. Just assume that your flashed or did something with your psp and you screwed up and your psp doesn’t show anything when you turn it on - its bricked , in the official firmware (