class My_Custom_Block extends Mage_Catalog_Block_Product_View_Abstract { protected function _construct() { // the $groupId make it so each customer group will be cached separately $groupId = Mage::getSingleton(‘customer/session’)->getCustomerGroupId(); $this->addData(array( ‘cache_lifetime’ => 5600, ‘cache_tags’ => array(Mage_Core_Model_Store::CACHE_TAG, Mage_Cms_Model_Block::CACHE_TAG), // you can add anything to the cache_key to make it cache separate versions for different customers and stores ‘cache_key’ => “custom_unique_name_{$groupId}” […]

You can create an XML sitemap for you Magento store by logging into your administration panel and going to Catalog > Google Sitemap. This interface is pretty straightforward, just be aware that each store must have its own sitemap. Also note that the the Path must be writable by the file system. When you click […]