in the create a new group form, add the line of text above the radio button list under "Set Default Access Privileges"

Please see the treatment for this form appearing at http://next.dev.curriki.org/xwiki/bin/view/Groups/CreateNewGroup.

Look specifically at the section "Set Default Access Privileges."

There should be a Trans line that displays above the stacked radio button choices.

The display text that appears there is "Here you choose the default setting that determines who can view and/or edit your group curricula."