While modders can create texture replacements for existing PSP games (such as Need for Speed: Most Wanted or Gran Turismo ), these mods only change the surface appearance. They cannot inject the game engine, map geometry, or physics of Forza Horizon 5 into a PSP file. Any video claiming to show FH5 running on PPSSPP is typically showcasing a heavily modded older racing game with a superficial user interface (UI) overlay.
Creators often use Photoshop to place the game's UI overlays and hyper-realistic cars onto mobile phone screens to trick viewers. forza horizon 5 ppsspp iso download android mobile install