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how to have custom 3.90 Firmware

Thanks to hako
How to have Custom Firmware 3.90 M33


- Installation requires a PSP with 3.52 M33-3 or higher [fat PSP], or 3.60 m33 or higher [Slim PSP] Others and Offical sony firmwares shouldn't try it.

- Battery 78% loaded, - Kernel acces on 3.XX

- Copy the UPDATE folder into /PSP/GAME/

- Run it, the update will be done by Sony updater. At the end when you are asked to reboot the

PSP pressing X or O, do it.Do not skip this step shutting down the psp by yourself, or you'll end with a brick.

- If you have a Japan PSP, you have to fake your region to EU or US in recovery

- Skype for Slim PSP

- GoMessenger not working waiting update Coming soon

Custom Firmware 3.90 M33-3 UPDATE (password : hako)

- Copy UPDATE folder to /PSP/GAME and run the program.

Custom Firmware 3.90 M33 1.50 Kernel Mod

Only for Fat PSP (PSP slims shouldn't try it.)

- Copy the 150k_addon folder into /PSP/GAME150/

- Copy the 150.PBP file into Main Menu (memory stick first page)

- Run it

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  • TomM 1 hour ago

    Thanks and 100% works. I will share it with my friends

  • Terminator! 1 hour ago 

    Good thing I found this site. Thank you

  • tinkerbell 2 hours ago  ]
    Well executed but I cannot move to next level. Works perfect for me
  • Vince 4 hours ago  ]
    I ve been looking for this for a long time. Very Good.
  • dansw4 5 hours ago  ]
    Cool!!!!!!!!!!!!!!! I will buy you a bottle of beer for this.
  • Joe Schmo
    Damn great stuff!!!!!!!
  • Deb
    Good thing this is free! thanks anyway
  • Grumpppy ]
    What you see is what you get. I thought this is fake. Lolz
  • LJM
    This is epic! Cool
  • joanna
    Thanks. Works fine!