The original 2010 PSP Mini release (ID: NPEZ-00269) had a catastrophic bug. Upon completing level 1-5 (the first night level with mushrooms), the screen would go black, and the console would freeze.
On your PSP's memory stick, navigate to the PSP folder, then the GAME folder (e.g., G:/PSP/GAME/ ). plants vs zombies psp cdromance install
Before diving into the installation, you must understand why CDRomance is the preferred source for this specific file. The original 2010 PSP Mini release (ID: NPEZ-00269)