[John]

And with the new version, all you have to do is replace:

if (($bbuserinfo[usergroupid] == "1") or ($bbuserinfo[usergroupid] == "3") or ($bbuserinfo[usergroupid] == "4")) {
  show_nopermission();
}

with

if (($bbuserinfo[usergroupid] != "11") && ($bbuserinfo[usergroupid] != "6") && ($bbuserinfo[usergroupid] != "5") && ($bbuserinfo[usergroupid] != "7")) {
  show_nopermission();
}

wherever it appears (it might appear up a few times)