Psp 352 M33 Upgrade To 660 Portable Jun 2026

Download the archive and the official Sony 4.01 OFW (Official Firmware) update file.

Upgrading from the outdated 3.52 M33 to 6.60/6.61 is essential for modern PSP functionality, allowing you to play virtually all PSP games, homebrew, and plugins. ⚠️ Disclaimer

Extract the 4.01 M33 installer files into this UPDATE folder.

Locate the folder included in the PRO-C download pack. Copy the CIPL_Flasher folder into PSP/GAME/ . Launch CIPL Flasher from your PSP's Game menu. Press X to install the custom IPL.

Run the latest homebrew, plugins, and ISO backups. psp 352 m33 upgrade to 660 portable

I can provide the exact file structures or troubleshoot any specific error codes you run into! Share public link

| Issue | Solution | |-------|----------| | “The game could not be started” (update) | Make sure the folder is PSP/GAME/UPDATE and the file is named EBOOT.PBP . | | Black screen after PRO-C install | Hard reset (remove battery for 10 seconds), boot while holding R to enter recovery. | | Stuck at 3.52 M33 with no update option | Use to jump directly to 5.00 M33, then proceed to 6.60. |

Your old ms0:/ISO/ folder still works. However, your old 1.50 kernel homebrew (those apps with two folders %__SCE__ and __SCE__ ) will work on 6.60.

Head over to the official website of the 6.60 Portable CFW and download the latest version. You can find the download link on various PSP forums and websites. Once you've downloaded the CFW, extract the files to a folder on your computer. Download the archive and the official Sony 4

: A Pro Duo card (or microSD adapter) with at least 64MB of free space.

Before downloading files, check your hardware to ensure a smooth installation process.

Fully compatible with permanent custom firmware. Since you are already running 3.52 M33, you own one of these hackable models.

Upgrading your PSP from the legendary custom firmware (CFW) to Locate the folder included in the PRO-C download pack

Modern CFW handles Sleep Mode and high-capacity microSD cards (up to 128GB) much better than the old M33 builds.

This is a more advanced but often faster method for users comfortable with recovery tools. It bypasses the need for many incremental official updates by "flashing" a firmware directly. Hellcat's Recovery Flasher is a powerful tool that can install a firmware of your choice from within a recovery environment.

Your current 3.52 M33 firmware cannot directly install newer official updates. You must first update it to the revision. This is a necessary safety measure; skipping this patch could cause the update to fail. The update is cumulative, meaning you can go directly from 3.52 M33 to 3.52 M33-4.