Extract the update files. You will see a folder named M33Update4 .
A: Yes, but 6.61 offers very few advantages over 6.60 and has worse plugin support. Stick with 6.60.
Rename the official Sony 4.01 OFW update file to 401.PBP and place it directly inside that same UPDATE folder.
3.52 M33 was a hero in its day, but 6.60 PRO-C is objectively better. You gain access to: psp 352 m33 upgrade to 660 portable
standard is highly recommended for better game compatibility, more stable homebrew, and easier installation of permanent hacks. The Upgrade Process
Upgrading a PSP from the ancient custom firmware (CFW) to modern 6.60 PRO or ME is a common task for users rediscovering their handheld consoles. While 3.52 M33 was a landmark version in the mid-2000s, it lacks support for later games, advanced plugins, and modern homebrew. Preparation: Before You Begin
If you are still running , you are using a Custom Firmware (CFW) from 2007. Upgrading to 6.60 is highly recommended. It allows you to play games released after 2007 without patching, improves system stability, adds support for the PSN Store (via specific plugins), and supports larger memory sticks. Extract the update files
If you have a or an early PSP-2000 , a Pandora Battery and a Magic Memory Stick are your best friends. This hardware-level hack can revive almost any software brick by forcing the PSP to boot from the Memory Stick and reinstall a fresh firmware.
For years, 3.52 M33 was the gold standard, but it is now obsolete. Modern CFW (Custom Firmware) offers better compatibility with newer games, PSN games, and better plugin support. We will be upgrading to , which is widely regarded as the most stable, "permanent-capable" solution for nearly all PSP models. Phase 1: Preparing Your PSP
Look for the latest game.txt and vsh.txt configurations to manage plugins. Conclusion Stick with 6
Take the official Sony 6.60 EBOOT.PBP file and drop it inside this UPDATE folder.