I have used Fold Category plugin for that with WP 2.1, but I am not sure if it works also with WP 2.3?
Coppermine plugin can be found at:
Coppermine plugin site at Webarchive
Seems also like mathse has upgraded plugin to version 4.0
I have not tested it though.
It can be found at:
http://blog.artworkz.net/?p=283
It would be nice improvement if Coppermine plugin could also write an ALT text to WP image using for example Coppermine “title” or “keywords” there.
