On another note, you'll want to watch your file structure. They are out of wack. While it will help you when organizing/editing, as well as help users, it also screws with the game. If a Portrait and Body are not in the exact same folders, it wont read them as their connected. Ill use Arachna as an example here.
In Bodies you have:
Adult - Empty
Adult+Teem - Empty
Blond - Empty
Inside Female you have more "Adult Adult+Teen.." Etc in it. The images are in there. 11 empty files if your counting.
However in Portraits you have:
blond - Empty
NO Female folder.
The images in Portrait are in the first set of ages instead of inside the female folder. The game wont read the Portrait and Body together. I can assume this was a mistake due to the amount of empty folders. You didn't move the images a folder deep enough.
I'm unsure if others have the same issue, but I do know a ton of them, if not all have a ton of empty files.
I really do appreciate the effort. Ive tried doing this shit several times on my own, and give up a few races in. What you're doing is a saints work. Since everyone who made a pack had their own way of making their folder setup, its difficult to merge them together. Unless you want a bloated file size (which does appear to slow the game down) Its only been viable to use one pack at a time. I do hope you don't get disheartened, and if I can help lemme know.