gistfile1.php

<?php
class Demac_Casl_Block_Adminhtml_Newsletter_Subscriber_Grid extends Mage_Adminhtml_Block_Newsletter_Subscriber_Grid
{

    /**
     * Prepare collection for grid
     *
     * @return Mage_Adminhtml_Block_Widget_Grid
     */
    protected function _prepareCollection()
    {
        $collection = Mage::getResourceSingleton('newsletter/subscriber_collection');
        /* @var $collection Mage_Newsletter_Model_Mysql4_Subscriber_Collection */

        $collection
            ->showCustomerInfo(true)
            ->addSubscriberTypeField()
            ->showStoreInfo();
        $collection->join(array('casl' => 'demac_casl/subscriber'), 'casl.subscriber_id = main_table.subscriber_id', array('casl.ip_address', 'casl.date_subscribed', 'casl.referrer_url'));

        if($this->getRequest()->getParam('queue', false)) {
            $collection->useQueue(Mage::getModel('newsletter/queue')
                ->load($this->getRequest()->getParam('queue')));
        }

        $this->setCollection($collection);

        return Mage_Adminhtml_Block_Widget_Grid::_prepareColumns();
    }


    protected function _prepareColumns()
    {

        $this->addColumn('subscriber_id', array(
            'header'    => Mage::helper('newsletter')->__('ID'),
            'index'     => 'subscriber_id'
        ));

        $this->addColumn('email', array(
            'header'    => Mage::helper('newsletter')->__('Email'),
            'index'     => 'subscriber_email'
        ));

        $this->addColumn('type', array(
            'header'    => Mage::helper('newsletter')->__('Type'),
            'index'     => 'type',
            'type'      => 'options',
            'options'   => array(
                1  => Mage::helper('newsletter')->__('Guest'),
                2  => Mage::helper('newsletter')->__('Customer')
            )
        ));

        $this->addColumn('firstname', array(
            'header'    => Mage::helper('newsletter')->__('Customer First Name'),
            'index'     => 'customer_firstname',
            'default'   =>    '----'
        ));

        $this->addColumn('lastname', array(
            'header'    => Mage::helper('newsletter')->__('Customer Last Name'),
            'index'     => 'customer_lastname',
            'default'   =>    '----'
        ));

        $this->addColumn('status', array(
            'header'    => Mage::helper('newsletter')->__('Status'),
            'index'     => 'subscriber_status',
            'type'      => 'options',
            'options'   => array(
                Mage_Newsletter_Model_Subscriber::STATUS_NOT_ACTIVE   => Mage::helper('newsletter')->__('Not Activated'),
                Mage_Newsletter_Model_Subscriber::STATUS_SUBSCRIBED   => Mage::helper('newsletter')->__('Subscribed'),
                Mage_Newsletter_Model_Subscriber::STATUS_UNSUBSCRIBED => Mage::helper('newsletter')->__('Unsubscribed'),
                Mage_Newsletter_Model_Subscriber::STATUS_UNCONFIRMED => Mage::helper('newsletter')->__('Unconfirmed'),
            )
        ));

        $this->addColumn('website', array(
            'header'    => Mage::helper('newsletter')->__('Website'),
            'index'     => 'website_id',
            'type'      => 'options',
            'options'   => $this->_getWebsiteOptions()
        ));

        $this->addColumn('group', array(
            'header'    => Mage::helper('newsletter')->__('Store'),
            'index'     => 'group_id',
            'type'      => 'options',
            'options'   => $this->_getStoreGroupOptions()
        ));

        $this->addColumn('store', array(
            'header'    => Mage::helper('newsletter')->__('Store View'),
            'index'     => 'store_id',
            'type'      => 'options',
            'options'   => $this->_getStoreOptions()
        ));
        $this->addColumn('ip_address', array(
            'header'    => Mage::helper('newsletter')->__('IP Address'),
            'index'     => 'ip_address',
        ));
        $this->addColumn('date_subscribed', array(
            'header'    => Mage::helper('newsletter')->__('Date Subscribed'),
            'index'     => 'date_subscribed',
        ));
        $this->addColumn('referrer_url', array(
            'header'    => Mage::helper('newsletter')->__('Referrer Url'),
            'index'     => 'referrer_url',
        ));

        $this->addExportType('*/*/exportCsv', Mage::helper('customer')->__('CSV'));
        $this->addExportType('*/*/exportXml', Mage::helper('customer')->__('Excel XML'));
        return parent::_prepareColumns();
    }

}