Vanilla PES 2009's gameplay was built around . The "Player ID" system was introduced here – Kaka felt different from Rooney. Patching does not change the core physics, but it enhances the context.
Created by the renowned Chinese modding group WEYX (from the Ali213.net forums, known in English as "游侠网" or "Game Pirates"), the WEYX 4.0 Soccer Grand Ceremony Enhanced Patch was a titan among mods. Weighing in at a colossal 3.5GB (which was enormous for a patch in 2009), it was practically a total conversion of the game. pro evolution soccer 2009 pes 2009 patched