6.20/6.35/6.39 PROMOD C1 Fix3 and 6.60 PROMOD C1 Fix4For all lower CFW's regardless of your versions, It's better to update to OFW 6.20 then install CFW 6.20 PROMOD C1 Fix3 to make your psp to play all ISO/CSO games and all PSX games (PSN version or custom made PSX).
Very important: NEVER USE 6.XX PRO_Permanent flasher on partially hackable units (PSP-2000 with TA88v3 mobo/PSP-3000/PSP Go/PSP E1000) otherwise this will "BRICK" your psp and will render your psp as a paperweight device.
How to update:1. Choose and download your PROMOD C1 version below based on their respective firmware version. (example: if you have OFW 6.20 then select CFW 6.20 PROMOD C1 Fix3, same steps goes for OFW 6.35/6.39/6.60).
Download
6.20 PROMOD C1 Fix36.35 PROMOD C1 Fix36.39 PROMOD C1 Fix36.60 PROMOD C1 Fix42. Extract the downloaded ".RAR" file to your desktop then copy the "PSP" folder to your root directory of your memstick.
3. Disconnect your psp from the USB mode then run the "PROUPDATE" from your psp. Press "X" to install when prompted. Wait until the update is complete.
For all hackable psp units, use 6.XX PRO_Permanent flasher to make your CFW permanently installed in your psp.
For all partially hackable units (PSP-2000 with TA88v3 mobo/PSP-3000/PSP Go/PSP E1000), use "Fast Recovey" to load your CFW back in the psp system. Remember, this is not a permanent hack. Once your psp is turned off, this will revert the system back to it's original firmware.
4. After the installation is complete, your psp is now updated. Enjoy!!!