Adding “Mutliselect” Attributes in Magento

#!/usr/bin/php
<?php
define('MAGENTO', realpath('/var/www/magento'));
ini_set('memory_limit', '128M');
 
require_once MAGENTO . '/app/Mage.php';
 
Mage::app();
 
$model = Mage::getModel('catalog/entity_attribute');
 
$model->setAttributeCode('mediaFormat');//attribute code
$model->setIsComparable(0);
$model->setIsConfigurable(0);	
$model->setIsFilterable(0);
$model->setIsFilterableInSearch(0);	
$model->setIsGlobal(0);
$model->setIsRequired(0);
$model->setIsSearchable(0);	
$model->setIsUnique(0);	
$model->setIsUsedForPriceRules(0);	
$model->setIsVisibleInAdvancedSearch(0);	
$model->setIsVisibleOnFront(0);	
$model->setDefaultValueYesno(0);
$model->setUsedInProductListing(0);	
 
$model->setFrontendInput('multiselect'); //make it a multiselect/dropdown
//0 is the admin value, 1 is the "default store view" (frontend) value
$frontEndLabel=array('0'=>'Media Format',
                      '1'=>'Media Format');
 
$model->setFrontendLabel($frontEndLabel);	
//0 is the admin value, 1 is the "default store view" (frontend) value
$optionData = array('value' =>
						array('option_0'=>array('0'=>'dvd','1'=>'dvd'),
						      'option_1'=>array('0'=>'vhs','1'=>'vhs'),     
						      'option_2'=>array('0'=>'blue-ray','1'=>'blue-ray')     
						)
					,
			        'order' =>
						array('option_0'=>1,
							  'option_1'=>2,
							  'option_2'=>3)
			   );
$model->setOption($optionData);
 
 
$data['backend_model'] = 'eav/entity_attribute_backend_array';
$data['apply_to'] = array();
$model->addData($data);
$model->setEntityTypeId(Mage::getModel('eav/entity')->setType('catalog_product')->getTypeId());
$model->setIsUserDefined(1);
var_dump($model);
 
try {
	$model->save();
}
catch(Exception $e) {
    echo $e->getMessage();
}
?>