Magento onestep checkout remove shipping method step

In this blog, we will see how to remove the shipping method step from magento onepage checkout

The source code of this module has been tested in magento 1.6 version but should work fine 1.4+.
Removing the shipping method step is pretty simple, here are the steps to do it. I am going to set the ‘freeshipping’ shipping method as the default shipping method so that the checkout process goes smoothly. Also for this code to work make sure the freeshipping method is enabled from admin. Attached is the source code for this module
open app\code\core\Mage\Checkout\Block\Onepage.php
change
$stepCodes = array('billing', 'shipping', 'shipping_method', 'payment', 'review');
$stepCodes = array('billing', 'shipping', 'payment', 'review');  

also open app\code\core\Mage\Checkout\controllers\OnepageController.php
find function saveBillingAction()
 add
 if (!isset($result['error'])) {

                $method = 'freeshipping_freeshipping';
                $result = $this->getOnepage()->saveShippingMethod($method);
                Mage::getSingleton('checkout/type_onepage')->getQuote()->getShippingAddress()-> setShippingMethod($method)->save();

before
if (!isset($result['error'])) {
                    if ($this->getOnepage()->getQuote()->isVirtual()) {
also change
elseif (isset($data['use_for_shipping']) && $data['use_for_shipping'] == 1) {
                    $result['goto_section'] = 'shipping_method';
                    $result['update_section'] = array(
                        'name' => 'shipping-method',
                        'html' => $this->_getShippingMethodsHtml()
                    );
into
elseif (isset($data['use_for_shipping']) && $data['use_for_shipping'] == 1) {
                        $result['goto_section'] = 'payment';
                        $result['update_section'] = array(
                        'name' => 'payment-method',
                        'html' => $this->_getPaymentMethodsHtml()
                        );

find function saveShippingAction()
look on
 if (!isset($result['error'])) {
                $result['goto_section'] = 'shipping_method';
                $result['update_section'] = array(
                    'name' => 'shipping-method',
 change
if (!isset($result['error'])) {
                    $result['goto_section'] = 'payment';
                    $result['update_section'] = array(
                        'name' => 'payment-method',

And also go to the app\code\core\Mage\Checkout\Model\Type\Onepage.php
add    if(empty($shippingMethod))
          $shippingMethod = 'freeshipping_freeshipping';
after starting of   public function saveShippingMethod($shippingMethod)    {