While WordPress has a great interface and some cool features, it is lacking in file management and a simple photo gallery. They have a lot of documentation about integrating various photo gallery scripts but without any recommendations. I know that is hard to do, but it would be nice to know that gallery2 works well with it. I had to spend quite some time to figure it out. Once I was able understand the elements gallery2, WPG2 plugin, every thing went well (except the mod_rewirte). For now I will live without it.
The should work: