Magento Customer/Customer Address Attributes installer script (for Community Edition).

customer_attributes_installer.php

<?php
/**
 * Customer/Customer Address Attributes Installer
 */

try {
  
  /* @var $installer Mage_Customer_Model_Entity_Setup */ 
  $installer = $this;
  $installer->startSetup();
  
  // Customer 'type' EAV attribute definition
  $installer->addAttribute('customer', 'type', array(
      'label'           => 'Customer type',
      'visible'         => true,
      'required'        => true,
      'user_defined'    => true,
      'type'            => 'int',
      'input'           => 'select',
      'source'          => 'eav/entity_attribute_source_table',
  ));
  
  $tableOptions         = $installer->getTable('eav_attribute_option');
  $tableOptionValues    = $installer->getTable('eav_attribute_option_value');
  
  $attributeId          = (int) $installer->getAttribute('customer', 'type', 'attribute_id');
  
  // Attribute options
  $options = array(
    'Individual', 
    'Professional'
  );
  
  // Add options
  foreach ($options as $sortOrder => $label) {
  
      // Add option
      $data = array(
          'attribute_id'  => $attributeId,
          'sort_order'    => $sortOrder,
      );
      
      $installer->getConnection()->insert($tableOptions, $data);
  
      // Add option label
      $optionId = (int) $installer->getConnection()->lastInsertId($tableOptions, 'option_id');
      $data = array(
          'option_id'     => $optionId,
          'store_id'      => Mage_Core_Model_App::ADMIN_STORE_ID,
          'value'         => $label
      );
      
      $installer->getConnection()->insert($tableOptionValues, $data);
  
  }
  
  // Add attribute to customer forms
  $attribute = Mage::getSingleton('eav/config')->getAttribute('customer', 'type');
  
  $attribute->setData('used_in_forms', array(
      'adminhtml_customer',
      'adminhtml_checkout',
      'checkout_register',
      'customer_account_create',
      'customer_account_edit',
  ));
  
  $attribute->save();
  
################################################################################
  
  // Customer Address 'telephone_landline' EAV attribute definition
  $installer->addAttribute('customer_address', 'telephone_landline', array(
      'label'        => 'Telephone Landline',
      'visible'      => true,
      'required'     => false,
      'user_defined' => true,
      'type'         => 'varchar',
      'input'        => 'text',
  ));
  
  // Add attribute to customer address forms
  $attribute = Mage::getSingleton('eav/config')->getAttribute('customer_address', 'telephone_landline');
  
  $attribute->setData('used_in_forms', array(
      'adminhtml_customer_address',
      'customer_address_edit',
      'customer_register_address',
  ));
  
  $attribute->save();
  
  $installer->endSetup();
 
} catch (Exception $e) {
    Mage::logException($e);
}