Thanks Steve - done and posted.
How can I pass a variable to this script from Applescript with the page number where to place the PDF file and continue without having to manually fill this out in the MultiPageImporter2.5-CS5.jsx popup ?
I just read your post over in scripting and it looks like you are trying to set the starting page field to the last page of the active doc?
dLog.docStartPG = dLog.pan1.add('edittext', [10,114,70,137], "1");
dLog.docStartPG = dLog.pan1.add('edittext', [10,114,70,137], app.activeDocument.pages.length.toString());