I am trying to add a new field into newsletter subscription form. I have found this solution. But when I open the file mentioned in the answer ie Mage_Newsletter_Model_Mysql4_Subscriber (app/code/core/Mage/Newsletter/Model/Mysql4/Subscriber.php)
I looks like:
class Mage_Newsletter_Model_Mysql4_Subscriber extends Mage_Newsletter_Model_Resource_Subscriber
{
}
It confused me to modify the file. Can any one please guide how to achieve what I want?