Use Windows Explorer to enter the game directory and create a copy of the "windows.fit" file and name it as "ixtlriimceourl". Note: In earlier versions of the game, the file must be renamed to "buymechcommander.2". Copy and rename "windows.fit" so both filenames are present if the game's patch status is unknown. Then, enter one of the following codes at the indicated screen. If you entered the code correctly, you will hear a sound. Note: Continues use of some of the codes may crash the game.