add random customers to Magento database

MagentoAddRandomCustomers.php

//PHP array containing forenames.
$names = array(
    'Joao',
    'Alberto',
    'Jose',
    'Raimundo',
    'Carlos',
    'Fabio',
    'David',
    'Mell',
);

//PHP array containing surnames.
$surnames = array(
    'Vilas',
    'Martins',
    'Angeluci',
    'Johnson',
    'Tremblay',
    'Peltier',
    'Cunningham',
    'Simpson',
    'Mercado',
    'Sellers'
);

$websiteId = Mage::app()->getWebsite()->getId();
$store = Mage::app()->getStore();

for($i=0; $i<30; $i++) {
    //Generate a random forename.
    $random_name = $names[mt_rand(0, sizeof($names) - 1)];

    //Generate a random surname.
    $random_surname = $surnames[mt_rand(0, sizeof($surnames) - 1)];

    echo "Adding user: ";
    echo $random_name . ' ' . $random_surname;
    echo "<br>";

    $customer = Mage::getModel("customer/customer");
    $customer   ->setWebsiteId($websiteId)
        ->setStore($store)
        ->setFirstname($random_name)
        ->setLastname($random_surname)
        ->setEmail('user'.$i.'@rededots.com.br')
        ->setPassword('somepassword');

    try{
        $customer->save();
    }
    catch (Exception $e) {
        Zend_Debug::dump($e->getMessage());
    }

}