The forum thread provided Alex with some valuable insights:
The is a popular third-party tool (often the version by mxSoniC ) that allows PC players to modify their custom player's data beyond the limitations of the standard game . Key Features of the BAL Editor
The PES 2010 BAL Editor represents a lost era of gaming—when players owned their games, modded them freely, and created their own legends without paywalls.
Players can access the Bal Editor from the game's main menu. Once inside, they can choose from a variety of pre-made ball templates or start from scratch. The editor allows users to customize the ball's:
: Unlocking specialized "Playing Style" cards (e.g., "Quick Turn" or "Marseille Roulette") that give players a tactical edge on the field. Career Logistics