--- form.php
+++ form.php
@@ -192,6 +192,16 @@
                         $elementadded++;
 
                         $isdateadded = true;
+
+                        if ($cm->modname == 'quiz') {
+                        $overridegroups = "\"" . $CFG->wwwroot . "/mod/quiz/overrides.php?cmid=" . $cm->id . "&mode=group \"";	
+                        $overrideusers = "\"" . $CFG->wwwroot . "/mod/quiz/overrides.php?cmid=" . $cm->id . "&mode=user \"";	
+                        $mform->addElement('html', "<div id='fitem_id_group_override' class='fitem fitem_fbutton femptylabel'><div class='fitemtitle'>
+                                                <label for='id_group_override'></label></div><div class='felement fbutton'>
+                                                <button><a href='#' style='text-decoration:none; color:#000;' onclick='window.open(".$overridegroups.", \"newWin\", \"width=800, height=600\"); return false'>". get_string('addnewgroupoverride', 'quiz') . "</a></button>
+                                                <button><a href='#' style='text-decoration:none; color:#000;' onclick='window.open(".$overrideusers.", \"newWin2\",  \"width=800, height=600\"); return false'>". get_string('addnewuseroverride', 'quiz') . "</a></button>
+                                                </div></div>");
+                        }
                     }
 
                     if ($isdateadded) {