Disconnect the PSP. Go to and run the PSP Update 6.60 . Follow on-screen instructions. Do not turn off your PSP.
Follow the instructions to flash the IPL, making the custom firmware stick after a full power-off. Step 4: Installing PSP "Portable" Tools (Plugins) psp 352 m33 upgrade to 660 portable
Upgrading from (PRO or LME) is the single best performance and compatibility upgrade you can perform. But there is a catch: you cannot simply drop the update files onto your memory stick and run them. Sony’s official updates will fail because the 3.52 M33 NAND structure differs from later official versions. Disconnect the PSP
Disconnect the PSP. Go to and run the PSP Update 6.60 . Follow on-screen instructions. Do not turn off your PSP.
Follow the instructions to flash the IPL, making the custom firmware stick after a full power-off. Step 4: Installing PSP "Portable" Tools (Plugins)
Upgrading from (PRO or LME) is the single best performance and compatibility upgrade you can perform. But there is a catch: you cannot simply drop the update files onto your memory stick and run them. Sony’s official updates will fail because the 3.52 M33 NAND structure differs from later official versions.