How to Downgrade Official PSP Firmware 6.10

December 3, 2009   ·   admin   ·   Jump to comments Tags: 6.10, downgrade, downgrader, firmware, how, how to, How to Downgrade PSP Firmware 6.10, ofw 6.10 to cfw 5.50, psp, PSP Custom Firmware, to

How to Downgrade PSP Firmware 6.10 to PSP Custom firmware 5.50 . A pretty decent downgrader tutorial guide I have found online .

This is a guide I found online and all credit will go to the creator of this Guide. This Guide is pretty straight forward and will walk you step by step on How to Downgrade PSP Firmware 6.10 and install PSP Custom firmware 5.50 into your PSP .

This Guide was created by Member nick_shire from pspslimhacks.com which the original source could be seen from here

01. Format the memory stick through the PSP. Format the memory stick through the computer.
02. Download PSP Grader and Unzip. Download Here or Here
03. Download the Official Firmware 5.00 and Unzip. Download Here
04. Connect the PSP through USB.
05. Run the PSP Grader.
06. Load the Official Firmware 5.00 by selecting the download Eboot.pbp. Select the appropriate drive letter for PSP and Click ‘Create Pandora stick’.
07. Disconnect the USB mode on PSP and Turn the PSP off.
08. Hold down the Left shoulder key (L) and then enter the Pandora battery while pushing the battery in.
09. Install the 5.00 M33 Firmware and Reboot the PSP.
10. Take the Pandora battery out and insert the normal battery and Turn on the PSP.
11. Download Custom Firmware 5.00 M33-6 and Unzip. Download Here
12. Connect the PSP through USB.
13. Copy the UPDATE folder and paste it to the PSP\GAME\ folder.
14. Disconnect the USB mode on PSP.
15. On your PSP, scroll to Game and click Memory stick.
16. Click on Update 5.00 M33-6.
17. Install the 5.00 M33-6.
18. Download the Custom_Firmware_5.50_MHU and Unzip. Download Here
19. Copy the UPDATE folder and paste it to the PSP\GAME\ folder. (Delete the previous one before copying this one. OR. Overwrite the existing one).
20. Delete the file named ‘sce.pbp’ from the UPDATE folder.
21. Download PSP_Firmware_5.50 and Unzip. Download Here or Here
22. Rename the sce.pbp tp SCE.pbp. (Convert the small letters to Capital letters).
23. Copy and paste to PSP\GAME\UPDATE Folder on the PSP.
24. Disconnect the USB mode on PSP.
25. On your PSP, scroll to Game and click Memory stick.
26. Click on Update 5.50. (Make sure your battery is fully charged)
27. Install the 5.50.
28. Restart the PSP once the update finishes.
29. Click the Select button on your PSP and select ‘UMD ISO Mode’ on the pop up menu.
30. Click the Right directional button and select M33 Driver and press Select again.

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