On your PSP, go to to apply it. How To Install CUSTOM CTF THEMES On Every Modded PSP

While technically the PSP’s successor, the Vita received the full game, though it did not have an official "theme" released for its home screen in the same way the PS3 did. 🛠️ Fan-Made PSP Themes (.PTF & .CTF)

Usually feature Lee Everett, Clementine, or the iconic "Don't Open, Dead Inside" hospital doors.

These are "official" style themes that work on both stock and Custom Firmware (CFW). They change icons and wallpapers but cannot alter the XMB layout or system sounds.