Several years of experience in training lecturers for developing and tutoring project-based learning (PBL) courses have resulted in a 'practise as you preach' based and flexible training programme. This programme was successfully incorporated in the teacher training programmes of the University of Twente and other universities and polytechnics in the Netherlands, but turned out to be an even greater success as a complete PBL training programme for Mexico's largest private university. In this paper, we describe the training programme as it was delivered to the Mexican lecturers in 2002, and its evolution over the years. Based on evaluation results, we discuss further improvements and the implementation of the training concept in different contexts. (Contains 5 notes and 2 figures.)