Forced header/footer with htaccess

I have a file hosting site that is set up so that a link is sent out to a new file, but when you click on the link, all you see is the file (usually an image, but could be any type of file). I would like to force a header and footer on there, so it is better looking, and I can have some ads on there, as well as a link to the front page. I have it working, but since most of my files are images, they just show up as garbled text.

Here are the two important files:

htaccess

AddHandler headered .gif
AddHandler headered .jpg
AddHandler headered .png
AddHandler headered .zip
AddHandler headered .tar
AddHandler headered .gz
AddHandler headered .jar
AddHandler headered .mpe
AddHandler headered .pdf

Action headered /uploads/autowrap.php

Code (markup):

And the autowrap.php file that is called:

<?php

$header = "sidebar.php";
$ads = "ads.php";
$footer = "footer.php";

$file = $_SERVER["PATH_TRANSLATED"];
readfile($header);
readfile($ads);
readfile($file);
readfile($footer);

?>

Code (markup):

Sorry, I can't give an example as I had to deactivate this, due to it not working. Here is what is looks like when I try to view an image:

����JFIFdd��DuckyK��Adobed������!�� !1AQaq�

Code (markup):

It goes on for pages like that.

Any ideas how I can get this to work? The header, ads and footer all show up correctly, just the image/file that is supposed to be there is not.

Thanks in advance!

 

hum.. weired problems. If you have a file hosting website. For user downloads why add a little coding to make php add the extension on file download?