If you are playing on console, you should look for an rather than a full executable patch.
Copy the KONAMI folder to your folder (C:\Users[User]\Documents). Select "Replace" if prompted for any existing files. Classic PES 6 Retro Patches Download PES FIFA WORLD CUP 1994 Patch rar
For fans of the older engine, the is a highly regarded project that covers World Cups from 1994 to 2022. If you are playing on console, you should
Generally, you must download all "parts" of the mod, place them in a single folder, and run the setup.exe file provided. Option Files for PES 2021 (PS4/PS5) If you are playing on console