Your console is likely running official firmware instead of Custom Firmware. Re-enable your CFW using the "Fast Recovery" tool on your memory stick.
Look for the Plants vs. Zombies icon and press X to launch it. Troubleshooting & Tips plants vs zombies psp cdromance install
Open the PSP drive on your computer. You will see the root directory (featuring folders like PSP , MP_ROOT , and sometimes ISO ). Your console is likely running official firmware instead
To transfer the files, establish a data connection between your computer and your handheld. Insert your Memory Stick into the PSP. Power on your PSP. Connect the PSP to your computer using the Mini-USB cable. Zombies icon and press X to launch it
An official version of Plants vs. Zombies was never released for the PlayStation Portable (PSP) Go to product viewer dialog for this item.