In other words, I want to
Open folder
Select image.
Select second image.
Make the second image a layer in the first image so they look "double-exposed".
Then do that for every file in the folder. (using new images for both layers each time).
Seems like GraphicConverter does *everything*--just can't figure this one out.

(There is some flexibility here as the choice of images can be random or whatever. I can put them in different folders, we can "walk" down the file list as the macro progresses so file 2 becomes file 1 in the next iteration. Doesn't matter.)
--Darin