Extract the file, preferably to the folder with the installed game. Trainer must work in parallel with it, because when you start the game, press [Alt] + [Tab]to go back to Windows, run the trainer, set what you need and using the same keys back to the game.
Note:
Trainer only works with selected versions of the game.
Mode:
Game mode: single / multiplayer
Multiplayer mode: Internet
Player counter: 1 - 6
System requirements
PC / Windows
Recommended: Pentium II 300 MHz 64 MB RAM sound card