It's not the hacked one you have to replace, it's the clean one.
1º - Before running the game, replace your cleaned system.mrs with the hacked system.mrs.
2º - Run the game and let it load until it reaches the login screen.
3º - ALT + TAB out of the game, and replace your hacked system.mrs with your cleaned one.
4º - ALT + TAB into the game and login.
have fun!