Magento update script & Updating attributes

upgrade-0.0.1-0.0.2.php

<?php
$this->startSetup();

/** Update previous attributes
 * S.O.S we need to use frontend_label instead of 'label'
 * http://www.webguys.de/magento/eav-attribute-setup/
 * 
 * Column full name instead of column alias on updateAttribute
 * 
 **/

$this->updateAttribute(Mage_Catalog_Model_Category::ENTITY,'seo_title', 'frontend_label', 'SEO Title (Landing page)');
$this->updateAttribute(Mage_Catalog_Model_Category::ENTITY,'seo_text', 'frontend_label', 'SEO Content (Landing page)'); 


// Add new attributes
$this->addAttribute(Mage_Catalog_Model_Category::ENTITY, 'seo_title_listing', array(
    'group'         => 'SEO Content',
    'input'         => 'text',
    'type'          => 'varchar',
    'label'         => 'SEO Title (Listing page)',
    'backend'       => '',
    'visible'       => true,
    'required'      => false,
    'visible_on_front' => true,
    'global'        => Mage_Catalog_Model_Resource_Eav_Attribute::SCOPE_GLOBAL,
));


$this->addAttribute(Mage_Catalog_Model_Category::ENTITY, 'seo_text_listing', array(
    'group'         => 'SEO Content',
    'input'         => 'textarea',
    'type'          => 'text',
    'label'         => 'SEO Text (Listing page)',
    'backend'       => '',
    'visible'       => true,
    'required'      => false,
    'visible_on_front' => true,
    'global'        => Mage_Catalog_Model_Resource_Eav_Attribute::SCOPE_GLOBAL,
));


 
$this->endSetup();