[Therion] Combining PDFs with a page break

Hi, Fairly sure the answer is "that will need an external application". But I have two Therion output PDFs. (Imagine plan and elevation, if that helps you.) I want to combine them into a single PDF. Easy enough, use: map-image 0 0 ne But what if I want them in the same PDF, but always separated by a page break in the PDF, so that the user can select "print page 2" to print just one of them? Cheers, Tarquin