gistfile1.php

<?php

$installer = $this;
$installer->startSetup();
$setup = new Mage_Eav_Model_Entity_Setup('core_setup');
$entityTypeId = Mage::getModel('catalog/product')->getResource()->getTypeId();

$setup->addAttribute($orderEntityTypeId, 'remove_from_back_order', array(
    'group' => 'Fulfillment API',
    'label' => 'Remove from back order upon fullfiller API update',
	'type' => 'int',
	'input' => 'boolean',
	'default'           => '0',
    'class'             => '',
    'backend'           => '',
    'frontend'          => '',
    'source'            => '',
    'global'            => Mage_Catalog_Model_Resource_Eav_Attribute::SCOPE_GLOBAL,
    'visible'           => true,
    'required'          => true,
    'user_defined'      => false,
    'searchable'        => false,
    'filterable'        => false,
    'comparable'        => false,
    'visible_on_front'  => false,
    'visible_in_advanced_search' => false,
    'unique'            => false
));

$installer->endSetup();
// rebuild flat product catalog - to make new attributes visible in the system
Mage::getResourceModel('catalog/product_flat_indexer')->rebuild();