Website Cache-Clearing Issue

[cfmoran]

I've recently almost completed adding back the .png image files to my site for all the bands I've collected. The only problem is I think the volume of images on the page creating an issue. In speaking with GoDaddy who does my hosting, they think it is an issue where the cache needs to be cleared out. I was told to look for a cache-clearing PHP script or add-on to fix it. I did some digging and I think I found a script to add to my PHP that could possibly fix it. I just don't know where to add it. The script is below:

<?php
header('Expires: Mon, 26 Jul 1997 05:00:00 GMT');
header('Pragma: no-cache');
?>

Does anyone know where I should put it? Better yet, does this look like it'll do the trick? I wish I'd learned more about coding and such. This is probably really easy sh*t for someone who's done it before.

Thanks!

Craig