Change Drupal Blog Title tag and first H1 Title

<?php
 
function phptemplate_preprocess_page(&$vars) {
 
	$args = arg();
	if($args[0] == 'blog')
	{
		$vars['head_title'] = preg_replace("^Blogs^", "User's Blog", $vars['head_title']);
		$vars['title'] = "User's Blog";
	}
 
}
 
?>