here's the code block I'm interested in:
<?php echo (isset($_SESSION['eCartCheckoutForm_shipping_firstname'])?encryptcustomer($_SESSION['eCartCheckoutForm_shipping_firstname']):encryptcustomer($_SESSION['eCartCheckoutForm_firstname'])); ?> <?php echo (isset($_SESSION['eCartCheckoutForm_shipping_lastname'])?encryptcustomer($_SESSION['eCartCheckoutForm_shipping_lastname']):encryptcustomer($_SESSION['eCartCheckoutForm_lastname'])); ?>