Psp 352 M33 Upgrade To | 660 Portable

How I Upgraded a PSP 352 M33 to a 6.60 PRO or Rebirth-Style Portable: A Step‑by‑Step Guide and Notes

If you own a PSP 1000/2000/3000 with a custom firmware (CFW) like the M33 series and want a modern, portable-feeling experience by moving up to a 6.60-based release (6.60 PRO/PRO-C or similar), this post walks through the motivation, what to expect, and a practical, low-risk path. This is written for hobbyists who want a cleaner, more compatible firmware experience while keeping their PSP fully functional for games, homebrew, and media.

Upgrading from PSP 3.52 M33 (an older custom firmware by Dark_Alex) to 6.60 is a standard process that modernizes your handheld for better game compatibility and versatility. Upgrade Overview

PSN Access: While the store is mostly defunct, 6.60 allows better connectivity for local multiplayer and PS1 classics. psp 352 m33 upgrade to 660 portable

Step 4: Make It Permanent (Optional, Model Dependent)

If you have a PSP-1000 or a PSP-2000 with a v1/v2 motherboard, you can use the built-in CIPL flasher:

Step 2: The Leap from 3.52 to 6.60

There are two main ways to do this. The safest method for such an old firmware is using an installer that runs under your current CFW. How I Upgraded a PSP 352 M33 to a 6

Troubleshooting Common Issues

| 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 Hellcat’s Recovery Flasher to jump directly to 5.00 M33, then proceed to 6.60. |

Step 3: Installing Modern CFW (PRO-C2 or ME)

Once you have flashed the system to 6.60 (official or temporary custom firmware), you need to install the permanent custom firmware. Press Select on the XMB to open the VSH menu

Step 4: Final Tweaks & Recovery Menu

  • Press Select on the XMB to open the VSH menu. Here you can set ISO driver to Inferno (best compatibility), CPU speed, and more.
  • For full recovery menu, press R trigger while booting (only for permanent CFW models).

If you try to run the 6.60 update and get an error, you likely need to "clean" the firmware. Reset Settings System Settings > Restore Default Settings . This clears old M33 configurations. Optional Bridge : If 6.60 still fails, some users use Hellcat’s Recovery Flasher