I updated the Mystery Poster mod to work with SP 1.4.  The new version is in the mod database.

Description:
This mod allows the Admin to specify a board where all users can post as a "Mystery Poster". The persona of the mystery poster is set by the Admin. Members check a box on the posting page to designate a post as coming from the mystery poster. Once a post is made as the mystery poster only the Admin or Moderators may modify/delete it. The admin will still have access to the actual posters' IP addresses.

Dan