How to add first/last name in newsletter subscriber module in Magento1.9

How to  add first/last name in newsletter subscriber module in Magento1.9

 >> First add two fields ( subscriber_firstname, subscriber_lastname) in newsletter_subscriber table and
 app\design\frontend\THEME\default\template\newsletter\subscribe.phtml.

    >> Now edit this page : app\code\core\Mage\Newsletter\controllers\SubscriberController.php

        Here you'll find "public function newAction()"
            Paste the below code after this following code:
            $status = Mage::getModel('newsletter/subscriber')->subscribe($email);    //line (63)

     ///////////////////////// First Name //////////////////////////////

            if ($this->getRequest()->getPost('subscriber_firstname'))
                {
                     $subscriber = Mage::getModel('newsletter/subscriber')->loadByEmail($email);
                     $name     = (string) $this->getRequest()->getPost('subscriber_firstname');
                     $subscriber->setSubscriberFirstname($name);
                     $subscriber->save();
                }

     //////////////////////  END  ///////////////////////////////////////

            Do same for field Last Name....

    >> The above code will effect your frontend. If you want to see the information from Admin too, you have to implement a little bit.

    Go to this link : app\code\core\Mage\Adminhtml\Block\Newsletter\Subscriber\grid.php
    Add this code :

    //It will show the information to the admin on News Letter Subscriber Section.
    $this->addColumn('subscriber_firstname', array(
            'header'    => Mage::helper('newsletter')->__('Subscriber First Name'),
            'index'     => 'subscriber_firstname',
            'default'   =>    '----'
        ));