Merge PDF files but keep custom Meta data

This could also be scripted:

tell application id "DNtp"
	set theSelection to selected records
	if theSelection is not {} then
		set theMergedRecord to merge records theSelection
		set custom meta data of theMergedRecord to custom meta data of item 1 of theSelection
	end if
end tell

Well, theoretically… due to a typo in the AppleScript suite of version 3.8 the merge command isn’t available. The next release will fix this of course.