Enjoy perfect compatibility with official PlayStation 1 classics conversions.
The process requires stepping through intermediate versions to ensure the system's internal updater can handle the leap. 3.52 M33 to 3.52 M33-4
: While 6.61 is technically newer, 6.60 is widely considered better for compatibility with classic plugins and custom themes (CTFs).
: Your PSP must be charged to at least 78%. If the battery dies during a firmware flash, you risk a permanent brick.
Step 4: Installing Modern Custom Firmware (6.60 PRO-C or ME) psp 352 m33 upgrade to 660
I can provide the exact steps or file structures for whatever you want to do next. Share public link
Exit and restart. Press on the home screen (XMB) to open the VSH menu. Change USB Device to Flash 0 . Connect to a PC. Open vsh/etc/version.txt . Change release:9.90: to release:3.52: . Save and exit.
: Ensure your PSP is charged to at least 78% . If the power cuts during a firmware write, you may "brick" (permanently break) the console.
Download the along with the Official Sony 5.00 Firmware (EBOOT.PBP) . Rename the Official 5.00 EBOOT file to 500.PBP . : Your PSP must be charged to at least 78%
The installation process is largely the same for both:
Depending on your PSP model, the CFW might vanish if you fully power off the console.
You cannot upgrade directly to custom firmware from such an old version. You must first install the official firmware to act as a bridge. the Official Sony 6.60 Firmware (EBOOT.PBP file). Connect your PSP to your PC via USB. Navigate to PSP > GAME on your Memory Stick. Create a folder named UPDATE inside PSP > GAME .
Place the official EBOOT.PBP file into the UPDATE folder. Share public link Exit and restart
Rationale: 5.00 M33-6 includes the version.txt spoofing required to bypass Sony’s 6.xx battery check.
: This guide applies to the PSP-1000 and most PSP-2000 models. PSP-3000 and PSP Go require slightly different final steps for permanent installation (Infinity). Step 1: The Bridge Update (Fixing Potential Errors)
Moderate. Bricking is reversible on PSP-1000 via Pandora battery, but assumed unavailable for this paper.