DOWNGRADE ANY PSP! NEW PANDORA BATTERY!!

From PSPmod.com wrote:
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PANDORA'S BATTERY
=================

A universal PSP unbricker/downgrader by the Prometheus project, also
known as Team C D.

REQUIREMENTS
- A spare PSP Battery. Any make will do. Using a spare is best, as it
will not be possible to boot the PSP in its normal state with the
modified battery.
- A spare Memory Stick Pro Duo of less than 4Gb. (256Mb should be
enough for all applications).
- A PSP with a Custom Firmware such as OE, M33 or WC, or a PSP with
the 1.5 original kernel.

INSTALLATION PROCEDURE
- Connect the PSP to the PC with the Memory Stick inside via the USB
Connection.
- Format the Memory Stick using any utility.
- Use mspformat to format the Memory Stick logically.
- Remove the Memory Stick and disable the USB connection.
- Connect the Memory Stick again via the USB connection of the PSP.
- Manually create the PSP/GAME (optionally PSP/GAME150) folders on the
Memory Stick.
- Copy the "battery" and "installer" programs to the PSP/GAME
(optionally PSP/GAME150) folder.
- Copy the 1.50 official updater as UPDATE.PBP to the root of the
Memory Stick.
- Remove the Memory Stick and disable the USB connection.
- Run "installer" through the firmware on the PSP. This application
will create the firmware files on the root of the Memory Stick, as
well as msipl.bin.
- Connect the Memory Stick again via the USB connection of the PSP.
- Execute "msipl" application on the PC with the msipl.bin to write
the IPL to memory stick.
- Remove the Memory Stick and disable the USB connection.
- Execute "battery" application on the PSP to modify the battery.
- Congratulation, you are now in posession of a "Magic Memory Stick"
and a "JigKick Battery".

USAGE
- Insert Memory Stick into the PSP
- Remove power cord and insert the JigKick Battery into the PSP.
- A menu appears when the PSP boots. Follow the onscreen information
and instructions.

NOTES AND RESTRICTIONS
- The firmware in the Memory Stick is not a full 1.50, but a minimal
subset. Therefore, not all applications (such as flashers, or
recovery apps) will load.
- Only Memory Stick Pro Duo are compatible. Memory Stick Duo
(e.g. 32MB sticks) are not supported.
- The IDStorage cannot be totally restored, as there is no known way
to regenerate it properly.
- It is strongly RECOMMENDED to make a flash dump of the PSP before
any downgrading operation.
- There might be a BSOD at the end of the downgrade. This is normal,
and happens on the standard downgraders.
- All hardware revisions known at this day are supported.
- This release contains no Sony-copyrighted material. All required
Sony data is generated from the v1.50 update files.

CREDITS
- Please do not edit or remove these credits...
- All work done by the Prometheus team aka Team C D:

Adrahil (VoidPointer)
Booster
Cswindle (Caretaker)
Dark_AleX (Malyot)
Ditlew
Fanjita (FullerMonty)
Joek2100 (CosmicOverSoul)
Jim
Mathieulh (WiseFellow)
Nem (h1ckeyph0rce)
Psp250
Skylark
TyRaNiD (bockscar)

- With thanks to everyone who has contributed to the PSPSDK, without which
nothing would have been possible.