I dont know if phpbb would actually allow this to happen, but what about a multi picture upload system in the album? Ie. upload more than one pic at once for conveniance.
Also, if such as feature like that would be possible, would it also be possible to have a small preview picture beside the relivant fields? (Ie. a preview of pic1 appears next to the fields for pic1, and a preview for pic2 next to the fields for pic2 etc.) Again, just for conveniance. ^_^