Hi David,
I think you'll find code that does what you want in www\admin\bboard\add-new-topic-2.tcl
It's called from www\intranet\customers\bboard-ae-2.tcl
If you want to use the UI to do this for you, then in your browser go to /intranet/customers/bboard-ae?group_id=
That's a link from intranet/customers/view?group_id=
Hope this helps
Brian