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Re: AFTER UPGRADE MY PSP CANT READ ISO FILES SO I CANT...
Your ISO Games....
Presumably these are 'backup' of yours or others games ??
Do you have 'any' level of homebrew installed to be able to read your ISOs ??
If this is the case - you will need to revert back to the original firmware. . . if you need more detail, please comment.
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May be you have placed the game wrong.. ISO and CSO should go in the x:\ISO folder in the root directory. In
the same level where x:\PSP folder is at. If you dont have an ISO
folder just make one. Also take note that unless your PSP has a custom
firmware installed you can't play pirated games.
Video files should be located in the x:\VIDEO folder.
Mp3 are placed in the x:\MUSIC folder
images are placed in the x:\PICTURE folder.
Your CSO/ISO files should be in your ISO folder in the root of your memory stick. You might have to make this folder if you don't already have it. Also, your UMD mode have to be set to NO UMD REQUIRED, or M33 Driver. You must have Custom Firmware to play ISO/CSO games.
Please check you update. If your update is low, you must upgrade it to 3.52 m33 then download a firmware 3.70 m33 or higher to get the m33 recovery.
As your PSP start press SELECT and you can see a menu then go to "UMD ISO MODE" from "normal" change it to "Sony NP9660" then exit.
Now enjoy playing ISO or CSO game. Happy playing.
You cannot play .iso or .cso files (or any homebrew games) on your PSP unless you have firmware 1.5 or a custom firmware. Any "off-the-shelf" firmware such as 4.2 will not support these types of files. They will just show up as "Corrupted Data".
You can go through the process of downgrading your firmware from 4.2 to 1.5, then from 1.5 you may upgrade to a custom firmware such as 5.00 m33-4. Doing so would require a good deal of technical know-how and a LOT of patience. If you do not want to risk ruining your PSP, do NOT try this. Research methods of downgrading such as "Pandora's Battery" and other firmware downgraders.
You were able to download games from the PSP website because they are programmed to play on the current firmware. Even if you were to (somehow) properly convert the .iso or .cso files to an EBOOT.PBP file, it would not run unless you have firmware 1.5 or custom.
Your psp must be custom firmwared for you to be able to play games from the ISO folder, to custom firmware it, it must have a pandora battery and the files required.
You can buy pandoras batterys and a magic memory stick off ebay for a reasonable price.
Hope this helps