[psp] possible 2.0 downgrader!

**mmg** · 26th September 2005

ive just read about it over at http://www.psp-spot.com/ i have a 1.5 myself so i cant test it to be sure, and my mates are unsure about letting me loose on theirs hehe, but it seems logical enough?

Our buddy MPH has released a 2.0 firmware downgrader using the new exploit found for the software. He has released very useful software before and this is no exception.

NOTE: PSP-Spot does not take any responsibility for any damage that this may or may not cause your PSP. Be warned, this is still in the testing phase.

Readme:

-> This is has not been tested <-

-> I AM NOT RESPONSABLE FOR EVENTUALS DAMAGES <-

Downgrading 2.00 -> 1.50 method
-------------------------------

Requires :
----------

- PSP 2.00 (if you have an 1.51 or 1.52, update to 2.00)
- The 1.50 EBOOT.PBP update (http://shockzone.free.fr/PSP/Tool/EBOOT_1.50.zip)
- MPHDowngrader (http://www.chez.com/mph/)

Installation :
--------------

- Create a UPDATE folder in PSP/GAME/ folder of your memory stick
- Copy EBOOT.PBP (update 1.50) in UPDATE folder
- Unpack MPHDowngrader.zip
- Copy the frame_buffer.png in PSP/PHOTO/ folder of your memory stick
- Set frame_buffer.png as background
- Copy h.bin in root of your memory stick
- Copy index.dat in root of your memory stick
- Copy overflow.tif in your PSP/PHOTO/ folder of your memory stick
- Plug the AC adaptor

Then, enter in VSHELL PHOTO MENU, this will launch Version Changer.

Create an USB connection and if the Version Changer has been installed, a new file is created in your root of your memory stick (ms0:/index.dat.bak).

Then go to VSHELL GAME MENU and launch 1.50 update.

Follow the instructions ...

MPH

I myself have tested it and the h.bin file that we use does do SOMETHING. It does apparently use an index.bat file and change it somehow when making the backup file, but at this moment the firmware update does not run. I'm sure we will see more results in the near future.