Regarding the sending of 4 PDF attachments. Create 4 Email Notifications and set the Conditional Logic to send a different Email Notification for each PDF (Field Map Layout). Then, check/uncheck the appropriate Email Notifications in each of the 4 PRO2PDF Field Map Layouts.

Regarding the name of attached PDFs, use the “Name of Field Map (will be used as default filename):” field found on the Field Map Layout to set the default PDF filename. You may include Formidable field shortcodes and/or static text.
See here

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