Group level preference settings can be achieved by a simply connecting to the CMS using windows script (VBS), copying the preference settings of a particular user to either; a specified list of users, a single user or all users. The CMC does not allow you to set preferences for groups of users at present (I believe that a future release will allow for this - a petition exists with BO). I modified a file we posted on here a while ago.
Not sure if it would work for you but I could send the file for you to look at.
Decisys (BOB member since 2004-05-21)