Your monitor does not do what this mod does. Your monitor takes, for example, the game at 800x600 and just stretches it to the full size of your monitor. This mod makes the game the actual size of your monitor, 1440x900 for example. Your monitor does not make the game 1400x900 it just stretches the normal game sizes to full screen. I hope I explained that well, if not the Bigg will surely correct me.