Magento get all order status

//get all order statuses and save the array $orderStatus[status][label]
//in $status associative array

$orderStatusCollection = Mage::getModel('sales/order_status')->getResourceCollection()->getData();

$status = array();
$status= array(
        '-1'=>'Please Select..'
        );

foreach($orderStatusCollection as $orderStatus) {
    $status[] = array (
        'value' => $orderStatus['status'], 'label' => $orderStatus['label’]
    );

}

If we wanted to add the order status in admin grid,  we then need to do the following,

//get all order statuses and save the array $orderStatus[status][label]
//in $orderStatusOptions[]

$orderStatusCollection = Mage::getModel('sales/order_status')->getResourceCollection()->getData();

foreach($orderStatusCollection as $orderStatus) {
    $orderStatusOptions[$orderStatus['status']] = $orderStatus['label’];
}