I am having trouble with this as well. I am trying to add custom races and professions to my game. I pulled the characterlaw mod file, unzipped, added my root.reference.racedata and root.reference.professions to both the common and client files, rezipped the whole thing, and changed the extension to mod, replacing my original characterlaw mod with the new one. It does not show up as a mod, and I am stumped. Thanks