Web stats question, script location

So I have installed WP on a GoDaddy server and am using their Traffic Facts product for stats. I need to insert the code at the bottom of this post into each page (post/page etc) I would like to monitor.

My question is how do I ensure I cover visits to the front page or category pages? I am assuming I can edit one or more .php pages in my home directory to cover all eventualities?

For example, I assume to ‘capture’ people at the login page I would need to insert this code into the wp-login.php page? To capture registrations into the wp-registration.php page?

Any help appreciated.

Thanks,
Paul

<script type=”text/JavaScript”
src=”http://rt.trafficfacts.com/tf.php?k=xxxxxxxxxxxxxxxxxxxxxxx;c=s;v=2″&gt;
</script>
<script type=”text/JavaScript”><!–
tfObj.process();
–></script>
<noscript><img src=”http://rt.trafficfacts.com/ns.php?k=xxxxxxxxxxxxxxxxxxxxxxxxxx&#8221; width=”1″ height=”1″ alt=””></noscript>