Let’s start off simple:

<?php
require("GTranslate.php");
try {
	$gt = new Gtranslate;
	echo "Translating [Hello World] from English to German => ".$gt->english_to_german("hello world")."<br/>";
	echo "Translating [Ciao mondo] Italian to English => ".$gt->it_to_en("Ciao mondo")."<br/>";
} catch (GTranslateException $ge)  {
	echo $ge->getMessage();
}
?>

Create a Function to Detect Language:
First Example for Ben’s Translator Plugin (Using a Session Variable):

<?php
function translateThis ($myText) {
	$pageURL = 'http';
	if ($_SERVER["HTTPS"] == "on") {$pageURL .= "s";}
		$pageURL .= "://";
	if ($_SERVER["SERVER_PORT"] != "80") {
		$pageURL .= $_SERVER["SERVER_NAME"].":".$_SERVER["SERVER_PORT"].$_SERVER["REQUEST_URI"];
	} else {
		$pageURL .= $_SERVER["SERVER_NAME"].$_SERVER["REQUEST_URI"];
	}
	//return $pageURL;
	$myVal = substr($pageURL, 0, 28);
	if ($myVal == "http://welovecakephp.com/es/") {
		$_SESSION['pLang'] = "ES";
	} else {
		$_SESSION['pLang'] = "EN";
	}
	if ($_SESSION['pLang'] == "ES") {
		require("GTranslate.php");
		/*
			these variable can be used in conjunction with JS dynamic content to make translated content easier
			ie: change image folders/forms/etc basically things that WordPress plugins might screw up
		*/
		$myLang = "es";
		$myLangDir = "/es";
		try {
			$gt = new Gtranslate;
			$gt->setRequestType('curl');
			echo $gt->en_to_es($myText);
		} catch (GTranslateException $ge) {
			echo $ge->getMessage();
		}
	} else {
		$myLang = "en";
		$myLangDir = "";
	}
}
?>

Second example (Using a Cookie):

<?php if ($_COOKIE['pLang'] != "English") { $_SESSION['pLang'] = "ES"; } else { $_SESSION['pLang'] = "EN"; }?>

Sample Usage

<?php
	$myVar = "This is a test of language translation, not word by word but instead this translates the intended meaning";
	translateThis($myVar);
?>

Of course you can change settings within this to suit your translation needs and this is a single use setup but it suited the purpose for which I needed it. I hope this helps you out, cheers!

Onto the script!

# stop on errors
set -e

# set the site for which you want to setup the custom php.ini
SITE=yoursite.com

# copy the php.ini to modify
mkdir $HOME/${SITE}/cgi-bin
cp /etc/php5/cgi/php.ini $HOME/${SITE}/cgi-bin/php.ini
cat << EOF > $HOME/${SITE}/cgi-bin/php-wrapper.fcgi
#!/bin/sh
exec /dh/cgi-system/php5.cgi $*
EOF
chmod 755 $HOME/${SITE}/cgi-bin
chmod 755 $HOME/${SITE}/cgi-bin/php-wrapper.fcgi
chmod 640 $HOME/${SITE}/cgi-bin/php.ini

# search and replace the php.ini
#!/bin/sh
INIFILE="$HOME/${SITE}/cgi-bin/php.ini"
rsync -a /dh/cgi-system/php5.cgi "$CGIFILE"
perl -p -i -e '
s/.*post_max_size.*/post_max_size = 100M/;
s/.*upload_max_filesize.*/upload_max_filesize = 100M/;
s/.*max_execution_time.*/max_execution_time = 1200/;
s/.*max_input_time.*/max_input_time = 1200/;
s/.*memory_limit.*/memory_limit = 250M/;
' "$INIFILE"

# create the new htaccess or append the handlers to your current .htaccess
FILE=.htaccess
cat >> $HOME/${SITE}/${FILE} << EOF
Options +ExecCGI
AddHandler php5-cgi .php
Action php-cgi /cgi-bin/php-wrapper.fcgi
Action php5-cgi /cgi-bin/php-wrapper.fcgi
EOF

Download the script

Option 1:

1. Close Winamp and Google Talk (also any other music player type programs)
2. Download and run one of the following files:
   • For Windows Vista 32 bit (x86), Windows 7 32 bit (x86), Windows XP (x86) and earlier versions of Windows
   • For Windows XP 64 bit Vista 64 bit and Windows 7 64 bit versions
3. You’re Done! (hopefully)

Option 2:

1. Close Winamp and Google Talk (also any other music player type programs)
2. Go to the Start Menu (bottom left corner of your screen), click on “Run” and paste in the following: C:\Program Files\Winamp\ then hit Enter or click “Ok”
3. A new window will open and inside of this new window select “File” then “New” then “Text Document”
4. Change the new text document’s name to “winamp.m3u” and re-open Winamp and Google Talk

Hope this was helpful, cheers!

EDIT: 2010-04-20
I have added versions for 64 bit versions of Windows (XP, Vista and 7)