Yes, it's possible, use appropriate method:
Utils_RecordBrowserCommon::set_display_callback($tab, $field, $callback);
Utils_RecordBrowserCommon::set_QFfield_callback($tab, $field, $callback);
Utils_RecordBrowserCommon::unset_display_callback($tab, $field);
Utils_RecordBrowserCommon::unset_QFfield_callback($tab, $field);
Paul