You cannot run a PS3 ISO on PPSSPP. However, you can run Ultimate Ninja Impact on PPSSPP at 4K resolution with texture filters that make it look better than the original PS2 games.
The story kicks off immediately with high stakes. Gaara, the former enemy turned ally and now the Kazekage of the Sand Village, is kidnapped by the Akatsuki—a criminal organization of S-rank ninjas. They intend to extract the One-Tailed Beast (Shukaku) from his body, which will kill him. --- Naruto Shippuden Ultimate Ninja Storm 2 Psp Iso