[Admin]

eva -- instead of this in showthread.php:

if (($bbuserinfo['userid']!=$thread['postuserid']) and (!$getperms['canviewothers'] or !$getperms['canreplyothers'])) {
	$replybox='';
} elseif (!$getperms['canview'] or (!$getperms['canreplyown'] and $bbuserinfo['userid']==$thread['postuserid'])) {
	$replybox='';
} elseif (!$thread['open'] and !ismoderator($thread['forumid'],'canopenclose')) {
	$replybox='';
} else {
	$textareacols = gettextareawidth();
	eval("\$replybox = \"".gettemplate('showthread_replybox')."\";");
}

use:

if (!in_array($bbuserinfo['usergroupid'], array(5,6,7))) {
	$replybox='';
} else {
	$textareacols = gettextareawidth();
	eval("\$replybox = \"".gettemplate('showthread_replybox')."\";");
}