err coppermine is full of sloppy code, has a most inflexible template system with zillions of hardcoded tags and validates as... err HMTL? not even that since there's missing tags all over the place. just take ANY page coppermine creates and paste it into your html eddy and do a sytnax check...
i don't know how people come to praise coppermine. yeah it "works" but is it any good? not by my standards.
gallery is better than coppermine, still also has major flaws and for sure is simply overkill for WP imho.
no "gallery" script is needed to achive that. besides I came to the conclusion that any and CMS to date falls short on "content management" since for me everything can be content, not just text and images...
nu to coppermine and ni to gallery