You need the original game (DVD or digital). It is often recommended to use a cracked .exe (version 1.04) as modern El Grande patches are built around it. Check modding forums for legal advice regarding your region.
The existence of patches like El Grande highlights a unique sentiment in the gaming community. Many fans argue that modern football games, while visually stunning, have sacrificed the responsive, purely skill-based gameplay of the early 2010s for slower, more "cinematic" experiences. Pes 2013 El Grande Patch
Since the original El Grande creators did not continue the series into PES 2013, modern players often turn to these active alternatives for the latest transfers and graphics: You need the original game (DVD or digital)