Use a file manager app (like ZArchiver) to extract the files.

To install and play WWE 13 PSP CSO UPD, follow these steps:

As security experts note: “If you did not expect a CSO file, do not open it immediately. First use antivirus tools to check the source file”.

Open the app and navigate to your PSP/GAME folder. Settings - Graphics:

Enable this under the System settings tab to boost overall emulation speed. Step 5: Launch the Game

If playing on a real PSP, a high-speed Memory Stick Pro Duo is necessary to avoid stuttering during loading screens.