Mod patches are highly sensitive to game regions and versions. If your addon is designed for the Japanese version of Winning Eleven, applying it to a European PES ISO will corrupt the data. Ensure your base ISO matches the mod's exact specifications. Step B: Apply the Patch

Just got the Winning Eleven 49 Addon running smoothly on my PS2 (slim, modded with Free McBoot).

Because the addon is unofficial, you won’t find it on Reddit or major gaming sites. Try these communities: