In Geometries -The must keeps are : deform/lights/maleOrig keep props and I am not sure if Camera is needed, it is not in P4. Rather than delete, you may consider moving the rest to a satellite Runtime - you can get at it if you need to but it is out of the way. The only part in Libraries would be the Primitives If you set your preferences to open to an empty stage, you will not use maleOrig.obj, but you may need to restore to factory state and Poser may not like him being missing at a time when you don't want Poser being distracted.