XPP 9.3 provides this functionality.
This would allow our users to access customized functionality from the standard Pathfinder Interface.
For example, if we wanted to perform a pre/post action when setting a CAP baseline or printing/exporting or completely change an interface aspect.
Additional Information. It turns out it is possible to do a pre/post of editing the Job, Div, and DA tickets. So these operations will also trigger the before and after scripts.