STEP 1 : First of all you need to install 3.02 oe-a,
THIS ONLY WORKS IF YOU HAVE VERSION 1.5. IF YOU DONT HAVE IT, DOWNGRADE FIRST
[FULL] 3.02 OE Custom Firmware Installer
This is an Installer (.EXE) for completely 100% easy installation of the new, best firmware.
Name: 3.02 OE Full Package Installer.rar
Size: 34MB
Description: 3.02 OE PSP Custom Firmware Full Package Installer
The download link is:
http://www.sendspace.com/file/ffe77a
Includes:
302.PBP
150.PBP
Update Maker Folders
3.02 OE Installer Folders
Recovery Folders for 3.02 with 1.50 recovery.
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Full 3.02 OE Custom Firmware Package
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Generating the DATA.DXAR:
1. Copy oeupdmaker and oeupdmaker% to /PSP/GAME/ if you are using 1.50 firmware and to X:/PSP/GAME150 if you are using whatever version of 2.71 Se.
2. Get the 1.50 and 3.02 Update eboots in the oeupdmaker folder with the names "150.PBP" and "302.PBP".
3. Run oeupdmaker. This program will create a file called DATA.DXAR in the same directory (oeupdmaker).
4. The program will verify that the SHA-1 of the generated file is correct.
5. Once that you have done this, you can save the DATA.DXAR file to skip this step in the future.
Flashing DATA.DXAR:
1. Copy the directories oeflasher and oeflasher% to /PSP/GAME (or /PSP/GAME150 if you are on 2.71 SE)
2. Copy the generated DATA.DXAR from oeupdmaker to oeflasher directory.
3. Run the flasher. If your battery is less than 75%, the program will show the error saying so and will return you to the XMB. This check can be by passed at your own risk by executing the program with triangle and L pressed.
4. The program will continue showing an agreement. Press X to accept and flash the custom firmware, or R to cancel and exit to the XMB.
5. If you accept, the program will flash the custom firmware. Don't shutdown the PSP and don't remove the memory stick.
6. Once finished, shutdown the psp and restart manually to 3.02 OE-A
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Any damage done to your psp is not my or other one's fault