((new)) - Psp 352 M33 Upgrade To 660

Upgrading a PSP from the vintage custom firmware to the modern

1. Download the 6.60 Custom Firmware package (e.g., 6.60 ME).
2. Copy the custom firmware installer folder to PSP/GAME/ on your memory stick.
3. Navigate to Game > Memory Stick and run the CFW installer.
4. The installer will patch the firmware.

   My PSP turns off immediately after running the 6.60 updater.

   Cause: Kernel conflict or low battery. Fix: Ensure your battery is 100% charged. If still failing, format the Memory Stick and run Hellcat’s Flasher again to go to 5.00 M33. psp 352 m33 upgrade to 660

   Conclusion

   Upgrading from the vintage 3.52 M33 to 6.60 PRO-C is like injecting new life into a 15-year-old handheld. The process is precise—you cannot skip the Hellcat’s step—but if you follow this guide, you will bypass the bricks and errors. Upgrading a PSP from the vintage custom firmware

   • Use Infinity 2.0 instead of CIPL (different process).
     But for simplicity, just run Fast Recovery after each full shutdown.

   Download PRO-C: Download the 6.60 PRO-C2 (or PRO-C Fix3) files. Download the 6

   Step 4: Installing 6.60 PRO-C Custom Firmware

   Now we install the modern, superior CFW.

   Game Compatibility: Play later-release UMDs and ISOs without needing "patches."