Ensure your console has a PSN account activated (it can be an offline dummy activated account via tools like Apollo Save Tool).
Tools like WebMAN MOD or Apollo Save Tool will automatically read the exdata folder on your USB to activate the game license permanently. Method B: Split PKG Files (Alternative) Call Of Duty Modern Warfare 2 Ps3 Pkg
Official Activision servers for the PS3 version are inactive. Ensure your console has a PSN account activated