Add Multiple Items in cart in Magento

$product_id = 32;  //Here is first Product id

$warranty_id = 35;  //Here is second Product id

//You can also pass multiple product id.

$someQty = 1; //Here is quantity

//You can add different quantity for different product.

$cart = Mage::getModel("checkout/cart");

$cart->addProduct($product_id, $someQty);

$cart->addProduct($warranty_id, $someQty);

            $cart->save();