Simple Google Analytics - Support

[mikebr]

I've just downloaded the Simple Google Analytics mod v1.2.5
What pages is it advised to place the Google Analytics Code?
One of the pages i understand the code should be placed is the

/common/tpl_main_page.php

Where in this page does the following code go?

<script type="text/javascript">

  var _gaq = _gaq || [];
  _gaq.push(['_setAccount', 'UA-XXXXXXXX-X']);
  _gaq.push(['_trackPageview']);

  (function() {
    var ga = document.createElement('script'); ga.type = 'text/javascript'; ga.async = true;
    ga.src = ('https:' == document.location.protocol ? 'https://ssl' : 'http://www') + '.google-analytics.com/ga.js';
    var s = document.getElementsByTagName('script')[0]; s.parentNode.insertBefore(ga, s);
  })();

</script> 

Google says to place the code just before the tag </header>

Unfortunately that tag does not exist.
Any help would be appreciated