So you would like to add some complexity to your business simulation based courses? Or just want to keep it interesting one year to another by slightly changing what decision making areas are available to your students? If you are using Cesim Business Management Simulations, you already know how easy it is to create a new simulations course, but you may yet to give a try to case customization. In this article we will walk you through why you should modify the modules of Cesim business simulation games, where to find them, what you can change, and how to apply them to your course.