How to place an image on a specific page
You can check template suggestions in the documentation.


  The list of suggested template files is in order of specificity based
  on internal paths. One suggestion is made for every element of the
  current path, though numeric elements are not carried to subsequent
  suggestions. For example, "http://www.example.com/node/1/edit" would
  result in the following suggestions:
  
  
  page--node--edit.tpl.php
  page--node--1.tpl.php
  page--node.tpl.php
  page.tpl.php
  


The template name started with "page--" is an override of page.tpl.php for a particular node or whatever.   


Find out what is the node ID of your "page-5", let's say it is node ID 1.  
Copy page.tpl.php and rename to page--node--1.tpl.php  
Then you can update it as you need ( print your image like you did in the front page ).