Your PSP is now on official software, meaning it cannot run homebrew yet. The final step is installing a modern custom firmware. You can choose between or 6.60 ME . Both are excellent, but PRO-C is widely favored for its online multiplayer features, while ME is great for traditional custom firmware purists. How to Install 6.60 PRO-C: Download the 6.60 PRO-C2 (or PRO-C Fix3) archive.
The safest path is to return to an official Sony firmware (OFW) first, then bridge to 6.60. Phase 1: Preparing for the Jump Charge Your Battery : Ensure it is at
Your vintage PSP is now completely upgraded from the obsolete 3.52 M33 environment to a fully modern, permanent 6.60 PRO-C portable powerhouse, ready for modern homebrew, plugins, and backups. psp 352 m33 upgrade to 660 portable
Now that your PSP is running a relatively modern 5.00 base, you can safely update to Sony's official 6.60 firmware. This clears out the old M33 registry files and prepares the console for clean modern CFW.
Did this guide work for you? Still getting a "DRNFFFFFFBOOT" error? Drop a comment below or hit up the /r/PSP subreddit. Your PSP is now on official software, meaning
Step 4: Installing Modern Custom Firmware (6.60 PRO-C or LME)
We will use Hellcat’s Recovery Flasher. This tool is famous for rescuing bricked PSPs, but it is also perfect for upgrading legacy M33 firmware without blowing fuses. Both are excellent, but PRO-C is widely favored
The updater for firmware 6.60 cannot process the file system of 3.52 M33. You must install 4.01 M33 first to act as a stepping stone.
While 3.52 M33 was a masterpiece in its time, it is highly outdated. Moving to 6.60 offers several crucial benefits:
If you are happy playing old ISOs from 2007, you don't need to upgrade. But here is what you are missing: