GamerZ's WP-EMail – set up trouble

Hi, I’m have TwentyTen/Weaver and am having trouble figuring out where to put the php code <?php if(function_exists(‘wp_email’)) { email_link(); } ?> to place the link between my header and my post. I’m guessing in the loop.php file, but can’t figure out where. Can anyone help? It’s such a great plugin, I can’t wait to see it on my page!!