gistfile1.txt

<?php

class Mdunbar_Loyalty_Model_Entity_Setup extends Mage_Eav_Model_Entity_Setup
{

    public function getDefaultEntities()
    {
        return array(
            'customer' => array(
                'entity_model'      => 'customer/customer',
                'attribute_model'   => 'customer/attribute',
                'table'             => 'customer/entity',
                'additional_attribute_table' => 'customer/eav_attribute',
                'entity_attribute_collection' => 'customer/attribute_collection',
                'attributes'        => array(
                    'loyalty_card_number' => array(
                        'label'  	=> 'Loyalty Card Number',
                        'type'		=> 'varchar',
                        'input'		=> 'text',
                        'visible'	=> true,
                        'required'	=> false,
                        'position'	=> 1,
                        'user_defined' => 1,
                    ),
                    /* etc etc...*/
                    /* 'opt_in' => array(
                        'label'		=> 'Opt In',
                        'input'		=> 'boolean',
                        'type'		=> 'int',
                        'visible'	=> true,
                        'required'	=> false,
                        'position'	=> 1,
                    )*/
                )
            )
        );
    }

}