When I create a large show that is divided into several chapters, I develop each chapter as a separate PTE project. The only restriction that I see here is that my chapters must have disjoint soundtracks. Once you have finished your chapters, it is an easy task to copy and past the chapters into a common project. You only have to take care that all audio clips in your chapters are links to a slide inside their chapters. In this case, copying the slides will copy the linked audio clips to their correct positions, as well. Regards, jt