Add to cart product with custom option

$params = array(
        'product' => $item->getProduct()->getId(),
        'related_product' => null,
        'options' => array(
                1 => 3,
        ),
        'qty' => 3,
);
 
$cart = Mage::getSingleton('checkout/cart');                                             
$product = new Mage_Catalog_Model_Product();
$product->load($item->getProduct()->getId());
 
$cart->addProduct($product, $params);
$cart->save();
 
Mage::getSingleton('checkout/session')->setCartWasUpdated(true);