Full Conversion: How to get Player Name?

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Isn't a .lang file basically just a .txt file with another ending? I don't think you can change it from within the game. Maybe you could code some sort of custom launcher instead that comes with your FC. It would ask for the player's name, automatically open, edit and save the .lang file and then start your Full Conversion...(or Amnesia, if you're making a CS instead) I'm a complete coding noob, though...maybe a batch file would work?