UPDATE*** ONLY TESTED ON ORIGINAL PSP (OR PHAT MODEL). DO NOT TRY ON OTHER MODELS!!
This is designed to remove custom firmware easily and restore a classic 1.5 firmware back to your psp. Most people know of the famous pandora battery technique which will unbrick and/or downgrade a psp's firmware. What I was not aware of is that the pandora technique in not necessary to downgrade from custom firmware psp's. So in case there are others like me,I thought I would share my knowledge.
THIS INSTRUCTABLE SHOULD REALLY BE TITLED HOW TO USE THE RECOVERY FEATURE ON CUSTOM FIRMWARE PSP'S PROPERLY (But I liked my title more)
As all disclaimers say. I am not responsible if something goes wrong.yada yada yada. watch out for the ninja monkees. yada yada yada. Do this at your own risk.
P.S. VISUAL AIDS WILL COME SOON.
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Step 1: What Is Needed.
Step 2: ...and Now... the Procedure,,,
1. Back up all your data on your memory stick as you will be formatting it.
2.Format your memory stick.
3.If you have not downloaded the file from the "what you need step", download it and extract it using win rar.(oh yeah.....install winrar first) =P
4.Connect your psp by going into USB mode.
5.Put the recovery folder into PSP/GAME/
6.Exit USB mode.
7.Completely shut down your psp by holding down the power button or removing the battery (make sure you are NOT going into sleep mode)
8.Press and hold down the right shoulder button while powering on the psp. you will be prompted with a flash screen (recovery mode ,main menu)
9.Select the option that reads Run program at PSP/GAME/RECOVERY/EBOOT.PBP
10.Follow the options as is. "X" to start " "R" to cancel. When done, manually restart the psp by completely shutting down again. Do this by holding down the power button.
11.When powering back on, you will see a blue error screen with lots of words in different languages on it. keep tapping "O" and you will be prompted with the default setup as you did when you first got your psp.
12.That's it your done. I hope this instructable was useful to anyone. Even just one person because then, it was worth writing.