Rainbow, I am sure there is a way to change the name of the group, but probably it must be done by someone with Administrative privileges. I have been an admin or mod at several boards before, and "behind the scenes", an Admin can make most any change.
I suggest you send a PM directly to an Admin or to a Moderator. Here is a page that lists all the moderators and administrators on this site:
http://forums.psychcentral.com/showgroups.php