Hello,
A new toolbox has just been uploaded on atoms portal: ATOMS : Multipage pdf toolbox details. It provides a gateway (pdfconcat) allowing to concat an arbitrary number of pdf files to form a single multipage file and a macro xapp2pdf() with the same API as xs2pdf() which allows to export graphics by appending a page to an existing file. To install it, use the atoms GUI (refresh the list of packages and select the “Graphics” category. You will find there the “Multipage pdf toolbox”. You can also do it on the command line:
atomsSystemUpdate
atomsInstall pdfconcat
atomsLoad pdfconcat
S.