Dasboard Widgets Order not working


1. I set the widget order like so but don't see the impact on new site dashboards:
// change the order of the widgets here
$dashboard_widgets_order_left_column[] = 'dashboard_right_now';
$dashboard_widgets_order_left_column[] = 'dashboard_recent_comments';
$dashboard_widgets_order_left_column[] = 'dashboard_recent_drafts';
$dashboard_widgets_order_left_column[] = 'dashboard_incoming_links';
$dashboard_widgets_order_left_column[] = 'dashboard_plugins';
$dashboard_widgets_order_left_column[] = 'dashboard_quick_press';

$dashboard_widgets_order_right_column[] = 'dashboard_primary';
$dashboard_widgets_order_right_column[] = 'dashboard_secondary';

2. Also the comments in dashboard-widgets-order.php indicate I can change the $dashboard_widgets_order_hash so that all users, not jstu new ones will see the new order. What do I change the hash to?