Just to clarify for my own peace of mind (apologies in advance if questions sound stupid but am not into this side am more of a skinner so this is all new to me), 1) if created a very simple theme hook (e.g. Global Message as per post at top) would this be exported with a theme and able to be used on another site when theme installed there ? 2) Would theme hook get overwritten with any forum or other ips app updates ? 3) If no to (2) above then if forum updates changed the point the hook looked for on where to insert it then hook would not work ? 4) Would the template that has the theme hook be upgraded or would it not be upgraded and have to be upgraded manually (similar to 3.4.x theme templates that had manual edit in them, when run a diff report would show that templates with edits in them would have to be upgraded manually) ... hope that makes sense ?