Note: This procedure involves editing a game file; create a backup copy of the file before proceeding. Use a text editor to edit the "savegame?.dat" where ? is the number for the saved game file in the "savegame" directory in the game folder. Search for the word "money" in the file and change the number behind it to "999999".
Locate the file "game.cfg" in the config folder of the game's installation directory. Open the file with Notepad and search for the word "money". Change the amount to 999999999 for max money