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.
Step 1: What is needed.
1. A PSP (with custom firmware on it)
2. A memory stick pro duo (512MB and 1GB have been tested and work fine. I cannot guarantee it will work with other size capacities)
3. A 1.5 Recovery File