Another way of accomplishing this is to load both into Poser at once (after the changes were made), align them to your desire and THEN export the morphtarget out of Poser. That also helps if it is something that changes the overall size of something, as Poser imports it in % of figure height. They will need to be resized so that only the moving part changes. An example of this is my morphing(opening) can. The lid, when opened, makes the can higher than the closed can, so in order to make it look right it is necessary to have both of them inside Poser for alignment.