Seek out the Call of Duty: Modern Warfare 2 – PSP Conversion Mod (available via community forums like GBAtemp or Wololo). This mod injects the MW2 arsenal (ACR, Intervention, Model 1887) into the PSP game engine.
Here are some tips and tricks to help you get the most out of playing Call of Duty: Modern Warfare 2 on PPSSPP: cod mw2 ppsspp top
Call of Duty: Modern Warfare 2 on PPSSPP – The Ultimate Mobile Experience Seek out the Call of Duty: Modern Warfare