To make the game run better than original PSP hardware, tweak these:
The PSP screen resolution is low (480x272), so text often looks blurry or pixelated. If you are playing on a PC or Android emulator (PPSSPP), you can make the text much sharper: call of duty modern warfare psp iso better
The closest you will get to a real "Modern Warfare PSP ISO" is the Call of Duty: Mobilized mod for Medal of Honor Heroes 2 (which runs on a modified Quake engine). To make the game run better than original
When you download this modded ISO, you are getting: Texture Filtering:
The ISO is demonstrably better because the UMD cannot be modified. You cannot patch a physical disc with AK-47 sounds. You can only patch an ISO.