Create PDF-File with merge function
Create more than one PDF-File from the Report and merge the PDF-File to one PDF-File
Alan Cossey commented
Bullzip is good for this for doing it programmatically.
You can use PDFtk to merge PDF with command line : https://www.pdflabs.com/tools/pdftk-the-pdf-toolkit/ , very easy to use
P.S. If you want a sample form, let me know