Note: If you get a version error, go into the M33 Recovery Menu (hold R while booting) and change the "Configuration > Use VshMenu" or "ISO Mode" settings, or check if "Version.txt" is enabled. Phase 4: Installing Modern Custom Firmware (PRO or ME)
Create a new folder inside GAME and name it exactly (must be uppercase). psp 352 m33 upgrade to 660 portable
is an excellent CFW that works on all PSP models, but permanent installation (CIPL Flasher) is only for hackable PSP-1000/2000 models. 6.61 Infinity is a different CFW that offers permanent installation for all models, including PSP-3000 and PSP Go, using a different method. 6.61's benefits are mainly for PSN and the web browser; for gaming, 6.60 is perfectly adequate. Note: If you get a version error, go
| Error / Issue | Likely Cause | How to Fix | | :--- | :--- | :--- | | | A common error when upgrading from very old CFWs. | This is fixed by Resetting IDStorage from the Recovery Menu. To access the Recovery Menu, hold R while booting your PSP. Navigate to Advanced > Format flash1 and reset settings . | | Version 9.90 error | The PSP's version.txt is spoofed to a higher number than the target firmware. | This is bypassed by using PSPGEN Version Builder as described in Step 3 . | | The game could not be started (80020148) | Usually occurs when the UMD ISO Mode is set incorrectly. | In the VSH Menu (Press Select in XMB), change UMD ISO Mode to either Sony NP9660 or M33 driver . | | Stuck at green light, no display (Brick) | This is a software brick. | This is reversible. You need a Pandora's Battery and a Magic Memory Stick to restore the PSP. It's recommended to prepare these before upgrading, especially on PSP-1000 models. | | This is fixed by Resetting IDStorage from
Here are the two most reliable methods to upgrade from 3.52 M33 to a modern 6.60 CFW.