How to theme checkout completion page in Drupal Commerce I'm having a problem with theming the checkout completion page. My designer gave me a layout that will show all of the order details in that page(nearly same as the checkout review pane). I already googled it and all of the links that I tried is not working. Please see the links below

theming checkout pages in Drupal commerce
http://theoleschool.com/blog/templating-commerce-order-completion-pane

Is there any tpl.php file that I need to include? or hooks to achieve my goal?

Thanks GUys
A quick google search yielded this result:  

Templating the Commerce Order Completion Pane  


  Turns out that's a fairly simple task thanks to
  hook_commerce_checkout_pane_info_alter. The function passes the
  variable $checkout_panes by reference which contains an array of
  checkout pane arrays. This function is going to allow us to redefine
  the function that the checkout completion pane is looking to for
  output.