Here it is, the Noobz and Team C+D have released a downgrader and unbricker for all PSPs!!! Here’s how it works:

1. You run a program on a homebrew-enabled PSP that will convert a standard PSP battery into a jigkick battery. Note that you can’t then use that battery normally - so you should use a spare one.
2. You run a program to generate the unbricker memory stick image, built from the v1.5 update EBOOT (note that this, and the custom IPL, means the release is completely free of Sony copyright materials).
3. You run some programs on a PC to install the image to your memory stick.

Now, you have a battery/memory stick pair that works just like the famous jigkick combination (but better) - just insert them into any PSP (even a brick) and the PSP will be reinstalled with the v1.5 firmware. As far as we know, this will continue to work for all future firmwares.

There’s a larger story behind this unbricker, though, and it deserves to be told. It’s the culmination of years of behind-the-scenes research and development by some of the top names in PSP hacking, under the name of the Prometheus project. This group of people, from various development teams, was dedicated to developing and releasing PSP hacks and exploits, with the aim of improving the status of PSP homebrew, and making sure that it was kept alive.

You can read all about from Fanjita here.

Download: Pandora’s Battery