SCRIPT tag Piwik Tracking code (no replies)

I want to write/set the SCRIPT tag (that is generated) in the Piwik Tracking code myself on a page. Where should I put it? Does it matter? I have very little Java Script knowledge.

This is a typical Tracking code:

<!-- Piwik --> <script type="text/javascript"> 
var _paq = _paq || []; 
(function(){ var u=(("https:" == document.location.protocol) ? "https://{$PIWIK_URL}/" : "http://{$PIWIK_URL}/"); 
_paq.push(['setSiteId', {$IDSITE}]); 
_paq.push(['setTrackerUrl', u+'piwik.php']); 
_paq.push(['trackPageView']); 
_paq.push(['enableLinkTracking']); 
var d=document, g=d.createElement('script'), s=d.getElementsByTagName('script')[0]; g.type='text/javascript'; g.defer=true; g.async=true; g.src=u+'piwik.js'; 
s.parentNode.insertBefore(g,s); })();
 </script> 
<!-- End Piwik Code -->

This is the part I want to 'write' myself:

var d=document, g=d.createElement('script'), s=d.getElementsByTagName('script')[0]; g.type='text/javascript'; g.defer=true; g.async=true; g.src=u+'piwik.js'; 
s.parentNode.insertBefore(g,s);

In my documents right now, I have it like this:

<!-- SCRIPT TAG PUT HERE BY ME -->
<script defer async src="http:/{$PIWIK_URL}/piwik.js"></script>

<!-- Piwik --> <script type="text/javascript"> 
var _paq = _paq || []; 
(function(){ var u=(("https:" == document.location.protocol) ? "https://{$PIWIK_URL}/" : "http://{$PIWIK_URL}/"); 
_paq.push(['setSiteId', {$IDSITE}]); 
_paq.push(['setTrackerUrl', u+'piwik.php']); 
_paq.push(['trackPageView']); 
_paq.push(['enableLinkTracking']); 
})();
 </script> 
<!-- End Piwik Code -->

Should I be putting the script tag BEFORE or AFTER the script block below?

Thank you for any help.