How to play ISO/CSO in PSP

Once you install the custom firmware on your PSP, you wont be able to play the games from backup ISO/CSO files. This needs to be enabled in the M33 menu.  To do this peformt the following:

1. Click on the ‘Select’ button for 2 seconds. A translucent menu would appear. This is called the “VSH Menu”

2. Navigate to ‘UMD DEVICE’ and select “Memory Stick”

3. Navigate to ‘UMD ISO MODE’ and select SONY NP9660 or M33 Driver

4. Exit then menu

Now you should be able to play games from ISO/CSO files

Thisworks only on PSP’s which are installed with M33 custom firmwares

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~ by KarthikK on August 4, 2008.

Posted in PSP
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13 Responses to “How to play ISO/CSO in PSP”

  1. OMG thanks! it finally works!

    been looking everywhere

    John said this on August 28, 2008 at 12:31 pm

  2. I BOUGHT A PSP AND ITS VER IS 3.90

    I PUT CSO FILE UNDER ISO FOLDER ON MEMORY STIC AND HAVE I INSERT THE MEMSTIC AND BROWSE IT ON PSP, I STILL DON’T SEE GAME.

    PLEASE HELP

    db said this on October 12, 2008 at 3:00 am

  3. Did you enable it like i mentioned in my post? Also you need custom firmware installed. post back here if you need any more help

    KarthikK said this on October 12, 2008 at 8:01 am

  4. Hi Karthik,

    I am avinash i have a PSP “FAT” i updated with Firmware V.5, but i am unable to update custom firmware to play ISO, CSO GAMES, plz help me……

    Avinash said this on October 25, 2008 at 3:20 pm

  5. Hello, I have a psp with 4.5 version firmware and I want to put games on it. I can’t and google isn’t helping. I’ve tried devhook and umd umululator as well. I think I need to downgrade it, but how? The pandora battery thing is long processed one and I don’t want to try it. Is there anything to try?

    Bob said this on November 22, 2008 at 2:01 pm

  6. help it really make me sob……….recently i unrealize upgrading my version to 5.01…….after that the before game cant play already ……..please teach me how to downgrading to version 1.5 or and version which compatible to play all website downloading game…….tank you very much appreciate .please write the downgrading step to my email.. bluezer_29@yahoo.com ur reply help is aspiration.. appreciate

    marvin said this on November 29, 2008 at 12:56 pm

  7. thanks so much man ive been tryin 4 forever

    A Mack said this on December 11, 2008 at 1:33 am

  8. if they cannot do video please please they can do video I cant I do not know myself not so well from thank you

    ich said this on December 13, 2008 at 10:11 pm

  9. a trust me you shoul try the pandora battery thing

    i did that thing and now i am running psp V5.02gen
    except that whatever you do first buy an extra battery

    because i still use the pandora battery as my charging battery and i dont have an extra battery

    But i got to say it was all worth making the pzndora battery

    jose said this on March 15, 2009 at 3:00 am

  10. Thanks!

    danielpaul94 said this on May 3, 2009 at 10:42 am

  11. hi.my psp plays only iso games and cant play cso and others…can anybody help me and tell me the setting?thank you..

    jim said this on October 26, 2009 at 4:20 pm

  12. Normally it should work. Try changing the driver to M33 or Sony 99xx in settings

    KarthikK said this on October 26, 2009 at 8:23 pm

  13. uhh
    ya
    i bought a psp yesterday, and i was playing it, all of a sudden it’s not working anymore.
    It’s a psp 3000, version 5.03
    It had this thing called ChickeN server that let it work, and now i think it’s gone
    i still have the games, it’s just not visible
    please please help me.

    Paul said this on October 31, 2009 at 4:25 pm

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