Bah - just saw this other thread http://luminous-landscape.com/forum/index....showtopic=16785
which seems to say stacking only works within the same folder. That clearly makes my workflow non-functional. This seems like a really stupid restriction.
Any ideas on other ways to keep multiple versions of an image together if they are in different folders?
I will say, keep the folder structure in mind, whatever you do. For example, I like to keep folders of similar imagery (or some might use each as a job). So I have a folder of just dog shots, a folder of each trip I take etc. I like the fact that I can batch rename using the folder name. So between that and using a unique data, I know where the image resides (based on folder) and what the image is (based on folder name).
If you want to then mix up all this stuff, collections are key.