Dear Pymol Users!

I want to solve one methodologycal problem via Pymol. I have 20 x-ray structures of one protein presented in different conformations.
The main problem is that all those structures consist of Hen Lysozyme inserted in the protein  for the improvement of the crystallographic properties of those structures.

I want to load my all 20 tructures in PyMol by one command from worked dir and make  alignment of that enssemble with one structure where there is no such insertion. As the consequence b this algorithm I want detect lyzocyme insertion in all my structures wich I want to deleate.

How I could realize all that via PyMol console ?