N00bz has stepped up the plate and nailed one again, with their release of “Pandora’s Battery”. An unbricker for all PSP’s.

Anyway - make sure to read the readme.txt in this release for how to use it, but in brief it works like this:

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.

-Noobz

Thank these guys for their great work,

In alphabetical order:

Adrahil, Booster, Cswindle, Dark_AleX, Ditlew, Fanjita, Joek2100, Jim, Mathieulh, Nem, Psp250, Skylark, TyRaNiD.

They can explain the rest of the story behind it themselves,

Click Here