I want to place the code for Google Analytics in my Zen-Cart installation but I only get an error on line bla bla bla, whereever I placed it in the code...

The code is
?>

<script src="http://www.google-analytics.com/urchin.js" type="text/javascript">
</script>
<script type="text/javascript">
_uacct = "UA-965295-4";
urchinTracker();
</script>

<?php

The "<?" and "php?>" I put on the code myself and it seems to make no or little difference...

Any help out there, where should i place these? Do i need to edit the code?