Me too.
One idea: Could ZP respect the order the files are numbered in, as in 1.jpg, 2.jpg...etc, or 2003.jpg, 2345, jpg.
If that could be done, one could rearrange them via ftp renaming. For now...
This would make it possible to have a photo that stays at the bottom, 9999999.jpg for example, and one that stays at the top of a gallery.