IMPORTANT

High probability of BRICKING , before doing anything you must have your old  Pandora MS SAVED in your PC , then don't format the MAGIC STICK , and even after the DES. CEM. is broken you can simply move your old pandora over your Boot changed MS and it works again.

Flash over USB 0.2 for Des. Cem/Pandora
jas0nuk
-----------------------------------------------

You need to have a suitable ELF menu set up in order to run this, such as my ELF menu 0.2a
Here or nandTool 0.3 Here.

INSTALLATION:
1) Get usb.prx, usbstor.prx, usbstormgr.prx, usbstorms.prx from the kd folder on a 1.50 dump
2) Copy them into ms0:/kd on your Des Cem v3 memory stick
3) Open ms0:/kd/pspbtcnf.txt and pspbtcnf_game.txt
4) Between the lines /kd/power.prx and /kd/mscm.prx, add /kd/usb.prx - do not add the other PRXs
5) Place Flash_over_USB_Menu_0.2.elf in ms0:/elf, then run it using my Pandora ELF menu. It will appear as "Flash over USB Menu" unless you rename it.

ENABLING ACCESS TO 3.80 FLASH0 (Slim only):
3.80 uses a new encryption, so you must perform the following steps to enable access to it's lflash partition over USB:
1) Get PRXdecrypter 1.8 from http://lan.st/showthread.php?t=1575 or http://forums.maxconsole.net/showthread.php?t=92789 or http://exophase.com/psp/prxdecrypter-18-2814.htm
2) Using PBP Unpacker or a similar tool, copy the DATA.PSP from the 3.80 updater EBOOT to ms0:/enc on your memory stick
3) Run PRXdecrypter, pressing X - this will extract the updater PRXs
4) Exit PRXdecrypter, and run it again, pressing X - this will decrypt the updater PRXs
5) Rename the newly extracted and decrypted sceLFatFs_Updater_Driver.prx and sceNAND_Updater_Driver.prx in ms0:/enc to lfatfs_updater.prx and nand_updater.prx and copy them to ms0:/kd, overwriting the existing ones
6) The menu will now be capable of accessing 3.80 files, but only on the Slim.

CHANGELOG:
0.2
- Uses some updater PRXs to handle the Slim's lflash encryption, so it no longer bricks. If the files cannot be loaded the app will not continue to run.
- Removed unnecessary USB modules

USAGE:
* Use D-Pad up/down to choose the device you want to mount as a USB drive, and press X.
* The device will automatically disconnect if you activate one and then activate something else, so you shouldn't need to use Force Disconnect unless there is a syncronisation problem.
* A small counter shows how many bytes have been read and written to/from the NAND (memory stick access is not counted)

Thanks to Dark_AleX, cory1492, SilverSpring and FreePlay

~jas0nuk

IMPORTANT:
- Have a VALID and UP TO DATE nand dump before you start messing with this, otherwise you could seriously screw up your PSP.
- Backup your existing lfatfs_updater and nand_updater if you plan to overwrite them for 3.80 support, as overwriting them might break the ability to flash 3.71 M33 from Des Cem. If you already lost them you can re-extract and decrypt them from the 3.71 updater.

SOURCE : http://forums.maxconsole.net/showthread.php?t=93409

This is the Jas0nuk Guide over at Maxconsole. For any adventurer who want to try it good luck.

(This post was last modified: 20/12/2007 05:34 AM by gsmoke.)