Hi guys, I made this PHP script, and you can use it to compress your CSS stylesheets, javascript files, text files, html files, and if you modify it, you can compress almost every text based file you want.
Here it is:
<?php
// made by João Jerónimo from http://joaojeronimo.freehostia.com
$file = $_GET['file'];
$ext = end(explode(".", $file));

switch($ext) {
case 'html':$type = 'text/html';break;
case 'css':$type = 'text/css';break;
case 'txt':$type = 'text/plain';break;
case 'js':$type = 'text/javascript';break;
case 'css':$type = 'text/css';break;
}

ob_start("ob_gzhandler");
ob_start("compress");
header("Content-type: $type charset: UTF-8");
header("Cache-Control: must-revalidate");
$off = 1800; # Set to a reaonable value later, say 3600 (1 hr);
$exp = "Expires: " . gmdate("D, d M Y H:i:s", time() + $off) . " GMT";
header($exp);

require_once($_GET['file']);

?>

And then, use it like this:

<link rel="stylesheet" type="text/css" href="gz.php?file=style.css" />
<script type="text/javascript" src="includes/jQuery/jquery-latest.pack.js"></script>
<script type="text/javascript" src="includes/thickbox/thickbox-compressed.js"></script>

If you noticed, you just have to add "gz.php?file=" before every file you add

Hope I've been usefull