Thank you so much for your rapid reply. It is really helpful. What I would really like to be able to do is have two options for the centre number text box. One allowing the CIE format (e.g. DE151) and one for the International Baccalaureate format (e.g. 004378). I have tried copying changing the config file in the same manner as the Exam Board by entering both centre numbers separated with a semi-colon, but that doesn't work. Is there an easy way to do this? I could, of course, just set it up differently on different laptops instead.