Thanks for this, Juan: it does give me part of what we want (a forum that some can post to but all can see), but adds in something we don't want (a forum that all can post to and see - i.e. the one for the 'All participants' group)
So: is there anyway of turning off the 'all participants' group activity that the 'visible group' setting shows. We just want one forum visible to all, but editable by the selected group.
And (being a bit picky now) can we not have a Discussions but No Replies setting (the other Discussions/replies combinations are all available) for forums?
Tony