Jump to content
Welcome to InsanelyMac Forum

Register now to gain access to all of our features. Once registered and logged in, you will be able to contribute to this site by submitting your own content or replying to existing content. You'll be able to customize your profile, receive reputation points as a reward for submitting content, while also communicating with other members via your own private inbox, plus much more! This message will be removed once you have signed in.

Sign in to follow this  
Velvet Nightmare

PSP Firmware Downgrader Complete!

2 posts in this topic

Recommended Posts

It's true everyone, the long wait is over! Another dev named MPH has created the MPH downgrader for v2.0 PSPs, finally allowing a full downgrade to version 1.50! I have tested this on two PSPs and had flawless results, but before we begin, I must say that...


...Although this has been tried and found working, this does not mean there is no risk involved so use at your own risk. I cannot be responsible for any damages caused to your PSP. Read: If you brick your PSP, don't blame me.


Now, let's continue, shall we?




Steps to use the MPH downgrader:

- Create an UPDATE folder in the /PSP/GAME/ folder of your memory stick

- Copy EBOOT.PBP (update 1.50) in /PSP/GAME/UPDATE folder

- Unpack MPHDowngrader.zip

- Copy overflow.tif in your /PSP/PHOTO/ folder of your memory stick

(make sure you have already changed your background to frame_buffer.png as explained in the toc2rta exploit.)

- Copy h.bin to root of your memory stick (meaning in ms0:/)

- Copy index.dat in root of your memory stick (meaning in ms0:/ as well)

- Plug the AC adaptor


You memory stick filesystem should look like this (where X is your memory sticks directory):




X:/PSP/PHOTO/overflow.tif (with no other pictures in there)

X:/PSP/GAME/UPDATE/EBOOT.PBP (the 1.50 Firmware update eboot)


What you do next is go into the Photo Menu on the PSP and it will show some jumbled text, which is normal. Wait about 30 seconds and then restart your PSP.


From there you will now have a new file in your PSP’s root directory called ms0:/index.dat.bak. In the next step you will go to your Game Menu, Then Memory Stick, and then Launch “PSP Update ver 1.50.”


If you get an error during the downgrade, this is OK. Restart your PSP and turn it back on. It will come up with another error which is OK as well. Restart it again and you will have PSP firmware version 1.50, and it will lead you through setting up language and time etc. Enjoy, and welcome to the world of homebrew, and (legal) gameplay off of your memory stick!


You will need the following files to accomplish this:


=> MPH Downgrader (2.0 to 1.5)


=> PSP v1.5 Firmware


=> TORC Exploit Tutorial



Good luck, and enjoy!

Share this post

Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now

Sign in to follow this  

  • Recently Browsing   0 members

    No registered users viewing this page.