Upgrading from the legacy custom firmware to the final (Official or Custom) version is a standard process, though it requires care due to the age of your current software. Recommended Upgrade Path The safest and most common method is to first revert to Official Firmware (OFW) before re-installing modern Custom Firmware (CFW) like 6.60 PRO-C
Place any ISO or CSO file into the /ISO/ folder on the root of your Memory Stick (create it if it doesn’t exist). For PS1 eboots, place them in /PSP/GAME/ . psp 352 m33 upgrade to 660 portable
Download the 6.60 Official firmware update from the official Sony website. Upgrading from the legacy custom firmware to the
If you’re still running the legendary custom firmware on your PlayStation Portable, you’re using a piece of history. However, many modern homebrew apps, plugins, and game backups require a newer firmware. Upgrading to 6.60 PRO-C (often referred to as “660 Portable” in the scene) unlocks full compatibility with the PSP’s final official firmware while retaining all custom features. Step 5: Configure Your PSP Download the 6
Because 3.52 M33 is a very old "Open Edition" style firmware, you may encounter specific hurdles during the upgrade: PSP: Updating from the 3.xx OE CFWs to the 6.60 ME CFW
By following these steps, you can unlock the full potential of your PSP 352 and enjoy a wide range of new features and capabilities. Happy gaming!
After the reboot, your PSP will be running . You have now successfully wiped the old M33 kernel.