Guide to installing 2.71 SE, and setting up recovery for downgrade.
If you don't yet have the updater, you can get it from:
Dark Alex's Official Site
It's the link named "2.71 Special Edition - Revision A custom firmware" incase you couldn't find it ;)
Note: I am not responsible for any possible damage caused by this guide. Use it at your own risk.
You need to downgrade, or already be on 1.5 first! You cannot upgrade from any other firmware apart from 1.5!
Update: Due to reports of people successfully upgrading from custom firmware, I no longer recommend doing it from unaltered firmware :) You can do it if you already have harleyg's custom firmware.
1. Get the 1.5, and the 2.71 eboots from somewhere.
2. Go into USB mode. Rename your "GAME" folder, to "GAME150". (Note: This step is only neccasary if you have 1.50 eboots in there.)
3. Make a new directory in PSP, called GAME (as the old one has been renamed.)
4. Extract the "seupdmaker" and the "%seupdmaker" folder, and place them in PSP\GAME
5. Extract the 1.50 eboot, and rename it to "150.PBP" and place it in the "seupdmaker" folder.
Also do the same with the 2.71 eboot, but rename it instead: (yes, you guessed it) "271.PBP" And place that in the same folder.
6. Exit USB Mode. Run the update maker eboot on the PSP.
It should say "Opening and checking 1.50 EBOOT...", followed by "Extracting 1.50 subset and packing..."
Next it will say "Opening and checking 2.71 EBOOT..." followed by "Extracting 2.71 Firmware and packing...".
After it quits, it should now have created a new file called "DATA.DXAR" in the same folder. This file should be exactly 17,483,018 BYTES.
To check the size of your file, assuming you use Microsoft Windows, while in USB mode right click on the file and click "properties". The size of the file is mentioned in the "Size" section. (Unsurprisingly.)
7. After it quits back to the XMB, go back into USB mode. Copy the "271seflasher" and "%271seflasher" to the PSP\GAME directory. Copy the "DATA.DXAR" file from the "seupdmaker" directory to the "271seflasher" directory.
8. Run it on your PSP, it should come up with an agreement. Press "x", and it should flash.
There you have it, you should have a shiny new 2.71SE PSP :)
Optional: Setting up recovery, for re-flashing to 1.50. Again, I'm not responsible for any possible damage caused.
1. Copy (or extract from the zip), the folder in the "files for recovery" folder named "RECOVERY" to PSP\GAME. You should now have four files in the "RECOVERY" folder, named:
- decryptprx.prx
- EBOOT.PBP
- extprxs.prx
- libpsardumper.prx
2. Rename the official update (EBOOT.PBP) you want to revert to, "UPDATE.PBP" (after any extraction from the zip/rar). This can be any firmware update from 1.50 to 2.71.
3. Place this in the "RECOVERY" folder that is now in PSP\GAME.
You can also set it to reflash 2.71 SE should you want to, by renaming it's "EBOOT.PBP" to "UPDATE.PBP" and placing along with the "DATA.DXAR" in the "RECOVERY" folder.
And there you have it! You should now be able to reflash or downgrade using the option in the recovery menu :)
Not tested myself (as I really like 2.71 SE, and can't see ever wanting to downgrade ;)), but I've deciphered the readme to step by step.
Cloudy
