function download_Attachment() {
		add_filter('rewrite_rules_array', array(&$this, 'add_rewrite'));
		add_filter('query_vars', array(&$this, 'add_query_vars'));
		add_action('template_redirect', array(&$this, 'download'));
	}
	
	
	function add_rewrite($rewrite_rules) {
		global $wp_rewrite;
		
		$wp_rewrite->add_rewrite_tag('%dattachment%', '([^/]+)', 'action=download&attachment=');
		$rewrite_rules += $wp_rewrite->generate_rewrite_rule('/'. $wp_rewrite->root .'download/%dattachment%');
		return $rewrite_rules;
	}
	
	function add_query_vars($query_vars) {
		$query_vars[] = 'action';
		return $query_vars;
	}