Preview changes: (1) when define later activity occurs don't tell the tool that it is define later but display a special screen before going to the next tool (2) for chosen grouping, schedule and permission gates show the normal page with an extra preview message then override the normal process and continue. Also part A of a change to the Flash call to get the learner progress - it should take the lesson id not the progress id.
Call passon to update the progress bar on tool pages, optional activities and the completed screen. Should also cope with the user partially doing an optional activity, continuing on in the design, then coming back later to the optional activity to do more, and then going back to where they were up to in the sequence before jumping back.