Pulling in new template into another template

[moondragon13]

I created my own template called header_cp

Now in another template I see:

</head>
<body$onload>
$header
$navbar


When I change $header to $header_cp nothing happens so of course I am doing something wrong. Any ideas on how I can pull my new template in at this spot?

[Dismounted]

You need to fetch the template via PHP before you can use it.