Add custom fields in review form

I am looking forward to create a custom fields 'Email Id' & One drop-down in Review form .

I have tried this one but not saving the data, its hows the fields only

app\code\core\Mage\Review\Model\Mysql4\Review.php

protected function _afterSave(Mage_Core_Model_Abstract $object)
{
$detail = array(
'title' => $object->getTitle(),
'detail' => $object->getDetail(),
'nickname' => $object->getNickname(),
'email' => $object->getEmail(), // New field 1
'fname' => $object->getFname(), // New field 2
);

Now add email,fname in the review_detail table in the database also go to app\code\core\Mage\Adminhtml\Block\Review\Edit\Form.php also add :

$fieldset->addField('fname', 'text', array( // New field 2
'label' => Mage::helper('review')->__('First Name'),
'required' => true,
'name' => 'fname'
));

$fieldset->addField('email', 'text', array( // New field 1
'label' => Mage::helper('review')->__('Email'),
'required' => true,
'name' => 'email'
));

before to

$fieldset->addField('nickname', 'text', array(
'label' => Mage::helper('review')->__('Nickname'),
'required' => true,
'name' => 'nickname'
));

Finally i have solved it... Open app\code\core\Mage\Review\Model\Resource\Review.php

you will find this code in line about 150

protected function _afterSave(Mage_Core_Model_Abstract $object)
{
$detail = array(
'title' => $object->getTitle(),
'detail' => $object->getDetail(),
'nickname' => $object->getNickname(),
);

Add the new two fields you want to add.

protected function _afterSave(Mage_Core_Model_Abstract $object)
{
$detail = array(
'title' => $object->getTitle(),
'detail' => $object->getDetail(),
'nickname' => $object->getNickname(),
'email' => $object->getEmail(), // New field 1
'fname' => $object->getFname(), // New field 2
);

Thats it no more.... :) Happy coding