Disconnect, go to Game -> Memory Stick, and run the 6.60 Update. Follow on-screen instructions to update to Official 6.60. Step 2: Installing 6.60 ME (Custom Firmware)
By default, this mod is temporary and will drop if your system completely runs out of battery power. Since your old 3.52 M33 system confirms you own an early hackable motherboard model (PSP-1000 or early PSP-2000), you can use the hardware flasher tool to make it permanent. Go to your console's > Memory Stick menu structure. Select and boot up the CIPL Flasher application.
Follow the on-screen prompts to install. Once completed, press X to reboot. Your PSP is now running 5.00 M33-6.
The 6.60 PRO-C CFW you just installed is a CFW. This means that every time you fully power off your PSP, the custom firmware will disappear, and your PSP will revert to its official 6.60 state. To get it back, you would need to run the FastRecovery application again.
Extract the archive on your computer. You will see folders named PROUPDATE and FastRecovery .
Upgrading a PlayStation Portable (PSP) from the legacy custom firmware to the modern
The most common mistake users make is downloading 660.PBP from Sony and running it immediately. If you run the 6.60 official updater on 3.52 M33, you risk a "brick" (a dead, black-screened PSP). Why? Because 3.52 M33 lacks the required IPL (Initial Program Loader) updates that happened in versions 3.71 and 4.01.
Disconnect, go to Game -> Memory Stick, and run the 6.60 Update. Follow on-screen instructions to update to Official 6.60. Step 2: Installing 6.60 ME (Custom Firmware)
By default, this mod is temporary and will drop if your system completely runs out of battery power. Since your old 3.52 M33 system confirms you own an early hackable motherboard model (PSP-1000 or early PSP-2000), you can use the hardware flasher tool to make it permanent. Go to your console's > Memory Stick menu structure. Select and boot up the CIPL Flasher application. psp 352 m33 upgrade to 660 portable
Follow the on-screen prompts to install. Once completed, press X to reboot. Your PSP is now running 5.00 M33-6. Disconnect, go to Game -> Memory Stick, and run the 6
The 6.60 PRO-C CFW you just installed is a CFW. This means that every time you fully power off your PSP, the custom firmware will disappear, and your PSP will revert to its official 6.60 state. To get it back, you would need to run the FastRecovery application again. Since your old 3
Extract the archive on your computer. You will see folders named PROUPDATE and FastRecovery .
Upgrading a PlayStation Portable (PSP) from the legacy custom firmware to the modern
The most common mistake users make is downloading 660.PBP from Sony and running it immediately. If you run the 6.60 official updater on 3.52 M33, you risk a "brick" (a dead, black-screened PSP). Why? Because 3.52 M33 lacks the required IPL (Initial Program Loader) updates that happened in versions 3.71 and 4.01.