B-Schools using Open Source ERP to Teach Business Processes

For years, there has been a need for teaching students about business process integration. The use of ERP systems has been proposed as a mechanism to meet this need. Yet, in the midst of a recent economic crisis, it is difficult to find funding for the acquisition and implementation of an ERP system for teaching purpose. While it is recognized that the use of ERP systems might provide a variety of benefits in a business school curriculum, how could business schools overcome the limited resources in order to bring in and integrate ERP systems into their business core classes?