How can I print multiple engagement letters at once?

[Username is two words]

Hoping there is a way to patch print engagement letters?

[Accountant-Man]

In Pro Series, you can set up two printers at the same time, 1) for the returns, and 2) for the letters.

Set up the printers for returns to include the letters, print to PDF for the returns and letters, then forget about the returns(PDF'ed), and 

2) Letters to a real printer. Highlight all returns in Home Base, print All, and letters go to the real printer and returns go to PDF or Outer Space.

I do this for Organizers since I like two sided Org pages, and PS doesn't allow that any more. Then I set up the PDF program to print two sided. The letters go to Printer B first, then when I print two sided Orgs they go to Printer B after the letters are done.