$page = Mage::getModel('cms/page');

$page->setStoreId(Mage::app()->getStore()->getId());

$page->load('CMS-IDENTIFIER-HERE','identifier'); //EDIT IN THIS LINE

$helper = Mage::helper('cms');

$processor = $helper->getPageTemplateProcessor();

echo $html = $processor->filter($page->getContent());

class Namespace_Module_Model_Observer {

        public function subscribedToNewsletter(Varien_Event_Observer $observer)

    {

        $event = $observer->getEvent();

        $subscriber = $event->getDataObject();

        $data = $subscriber->getData();

        $email = $data['subscriber_email'];

        $statusChange = $subscriber->getIsStatusChanged();

        if ($data['subscriber_status'] == "1" && $statusChange == true) {

                        //code to handle if customer is just subscribed...

                }

        }

}

class Namespace_Module_Model_Observer {

  public function customerRegisterSuccess(Varien_Event_Observer $observer) {

      $event = $observer->getEvent();

      $customer = $event->getCustomer();

      $email = $customer->getEmail();

      if($email) {

          //code to handle if customer is successfully registered

      }

  }

}

<?php $order = Mage::getModel('sales/order')->loadByIncrementId($this->getOrderId());

$quoteId = $order->getQuoteId();

$quote = Mage::getModel('sales/quote')->load($quoteId);

$method = $quote->getCheckoutMethod(true);

$customer_email = $order->getCustomerEmail();

if ($method == 'register'){ ?>

//code to handle if customer just registered to your site

<?php } elseif($method == 'guest') {?>

//code to handle if customer is guest

<?php } else { ?>

//code to handle for logged in customer

<?php } ?>

$_customerId = Mage::getSingleton('customer/session')->getCustomerId();

$lastOrderId = Mage::getSingleton('checkout/session')->getLastOrderId();

$order = Mage::getSingleton('sales/order');

$order->load($lastOrderId);

$_totalData =$order->getData();

$_sub = $_totalData['subtotal'];

$_orderEmail = $_totalData['customer_email'];

$_orderNumber = $_totalData['increment_id'];

$lastProductIdAddedToCart = Mage::getSingleton('checkout/session')->getLastAddedProductId();

if($lastProductIdAddedToCart) {

    $productCategoryIdsArray = Mage::getModel('catalog/product')->load($lastProductIdAddedToCart)->getCategoryIds();

    //print_r($productCategoryIdsArray);    

    $continueShoppingCategoryUrl = Mage::getModel('catalog/category')->load(end($productCategoryIdsArray))->getUrl();

}