Magento Website

http://stackoverflow.com/questions/8309076/how-to-create-a-site-store-and-view-programatically-in-magento
//#addWebsite
    /** @var $website Mage_Core_Model_Website */
    $website = Mage::getModel('core/website');
    $website->setCode('<your_website_code_here>')
        ->setName('<your_website_name>')
        ->save();

//#addStoreGroup
    /** @var $storeGroup Mage_Core_Model_Store_Group */
    $storeGroup = Mage::getModel('core/store_group');
    $storeGroup->setWebsiteId($website->getId())
        ->setName('<your_store_name>')
        ->setRootCategoryId('<needed_root_category_id>')
        ->save();

//#addStore
    /** @var $store Mage_Core_Model_Store */
    $store = Mage::getModel('core/store');
    $store->setCode('<your_store_view_code_here>')
        ->setWebsiteId($storeGroup->getWebsiteId())
        ->setGroupId($storeGroup->getId())
        ->setName('<your_store_view_name>')
        ->setIsActive(1)
        ->save();