🚀 go-pugleaf

Shane,

'make at end' didn't work either. The only way I got them in was to 'move to end of spread'.
To tackle all parameters I ended up with:

tell application "Adobe InDesign CS4"
	tell document 1
		tell document preferences
			set preserve layout when shuffling to true --not shure if needed
			set PagsInNieuweSpread to 1
			if facing pages is true then set PagsInNieuweSpread to 2
		end tell
		set DeMasterNamen to name of every master spread
		if (count of items of DeMasterNamen) is 1 then
			set TeGebruikenMasterNaam to (item 1 of DeMasterNamen)
		else
			set TeGebruikenMasterNaam to item 1 of (choose from list DeMasterNamen with prompt "Welke master gebruiken?")
		end if
		set PagsPerMaster to (count pages of master spread TeGebruikenMasterNaam)
		set NieuweSpread to (make spread at beginning with properties {applied master:master spread TeGebruikenMasterNaam})
		if PagsPerMaster > PagsInNieuweSpread then
			repeat (PagsPerMaster - PagsInNieuweSpread) times
				set NieuwePag to (make page at end of NieuweSpread)
				move NieuwePag to end of NieuweSpread --only way to get them in
			end repeat
		end if
	end tell
end tell

OK, some dutch for the variables, but you get the idea...
Thanks for leading me to this final solution!

Michiel