You're likely referring to a custom repackaged version of the game for the PSP, which involves creating a playable package (eboot.pbp) that can run on the PSP. This often involves modifying the original game to fit the PSP's hardware capabilities and controls.
Disconnect USB, go to the Game menu on your PSP, then Memory Stick . You will see the Jackie Chan Stuntmaster icon. Press X. jackie chan stuntmaster eboot pbp psp 13 repack