Hey Mike,
Hmmm...After thinking about this long and hard....I decided I need to think about it longer and harder.
This is a pretty convoluted deal really. Before I could say yes, the permissions file is the way to go, I guess I would have to understand how you planned to implement it.
Would it be a variable text file, initially written to during the directory scan you mention? Would admin set flags on this variable file causing respective folders, documented therein, to be "invisible on upload tree"? Could the admin do this via a checkbox on the "update titles and descriptions" or "edit" screens? Would an approach of this type require that a directory ID and directory display name be necessary when creating each folder?
Would it be possible to make a top level folder invisible or closed on the user upload directory tree but keep the subfolders, if appropriately flagged, visible or open to uploading?
I am not a big fan of HT access at least not for the gallery..... if I understand what it is.......that is the little gray user password screen right?
Maybe this idea is to much of a hassle to implement...I realize it may be outside the scope of the sript Mike.
Andrew