BTW.. I can change the group-forums by hand to a category and place (by hand) child-forums underneath. Works great (and is a lot of work)… until I edit my group. Then the group is confused, because the group-forum changed to a category. It creates a new forum itself (so, now I’ve a forum and a category (with child forums) with the same name and only the new empty forum displays in the group.
When I go to the group-settings again, I can’t change it back because then I can’t set a category as THE group forum. Sigh..
Oh, AND actually… I also want the automatical created ‘group-forum’ to be a category instead of a forum, so no one can post there anything. Only in the (hopefully automatic created) child-forums.