The University of Illinois at Urbana-Champaign (UIUC) Library participated in the statewide conversion to a new integrated library system in the summer of 2002. Prior to the system's implementation, various local and statewide committees coordinated efforts to train their staffs so as to ensure a seamless transition. This case study analyzes, in detail, the successes and limitations of the training program at the UIUC Library, with respect to the circulation module. The program can serve as a model for libraries needing to train a large staff body in a short amount of time.