If you want to play Resident Evil 4 legally on PSP or other platforms, here are lawful options:
ISOs (International Organization for Standardization) and CSOs (Compressed ISO) are file formats often used to distribute and play games on PSP consoles. A zip file containing "Resident Evil 4 Psp Iso Cso" likely refers to a compressed archive containing a converted or ported version of the game. Resident Evil 4 Psp Iso Cso.zip
0;f54;0;2cb; 0;d7;0;f1; 0;88;0;98; 0;279;0;17a; 0;1152;0;b19; If you want to play Resident Evil 4