Did you try IEBCOPY? Then you get that bit answered.
Or you want to avoid typing 100 copy statements?
Little bit of rexx. Directory list. Generate required statements. Split the statements into 8 or 9 (unless you know enough rexx to do that already) with the editor. Put the statements inside JCL executing IEBCOPY. Submit.
Ask someone here to put the kettle on for you.
I'd backup the PDS first, if you are going to be deleting members from it and don't have a backup already. Never any fun to delete the "wrong" 100 members. Even less fun without a backup.