Jrox affiliate and currency convertions

I use jrox affiliate software to generate leads for my zencart 1.3.8 sites. Some sites have there default currency set to pounds, others euros and others dollars. I need to convert the commission values to one common currency in jrox. I found the info below on the jrox forums, but as I am not a developer, I am not sure what the currency variable is and how to use it, see below:

JAM allows you to convert diffferent currency payments to the appropriate amount when triggering commissions in JAM.

To do this, follow these steps:

1. Make sure to send the "currency" variable to sale.php when triggering a commission. For example:
   http://www.domain.com/affiliates/sale.php?amount=$amount&trans_id=$trans_id&currency='USD'
2. If you have a currency variable that gets set dynamically, you can use this:
   http://www.domain.com/affiliates/sale.php?amount=$amount&trans_id=$trans_id&currency=$currency
3. Edit the /includes/currencies.php file to either add or edit the conversion table for your currency.

When JAM processes the commission, it will first lookup the currency conversion amount from the /includes/currencies.php file, then convert it to the proper amount.

Any help would be greatly appreciated.

You probably have added this code to your footer at some point (this is part of the JAM code):echo "<script language=\"JavaScript\" type=\"text/javascript\" src=\"http://www.mydomain.com/affiliates/sale.php?amount=$commissionable_order&trans_id=$orders_id\"></script></td></tr>To send the currency code, alter it as shown:```
echo "<script language="JavaScript" type="text/javascript" src="http://www.mydomain.com/affiliates/sale.php?amount=$commissionable_order&trans_id=$orders_id[B]&currency=$_SESSION['currency'][/B]"></script></td></tr>

Hi, sorry been away...

I tried your code, but it did not work, I currently have the code below, how would I need to change it:

[code]
##########################################

START JAM INTEGRATION WITH ZEN CART

ZC Integration code by DrByte 8/2006

##########################################

if (isset($zv_orders_id) && (int)$zv_orders_id > 0 && isset($order_summary) && is_array($order_summary)) {
if (!isset($_SESSION['affiliate_order_id']) || $_SESSION['affiliate_order_id'] != $zv_orders_id ) {
$_SESSION['affiliate_order_id'] = $zv_orders_id;
$commissionable_order_formatted = number_format($order_summary['commissionable_order'], 2, '.', '');
$jamintegrate = file_get_contents('http://www.mydomain.com/jamaffiliates/sale.php?amount=' . $commissionable_order_formatted . '&trans_id=' . $order_summary['order_number'] . '&custom_mid=' . $_COOKIE['jrox']);
}
}

#######################################

END JAM INTEGRATION WITH ZEN CART

#######################################
[code]

You would alter it using the very same approach

 $jamintegrate = file_get_contents('http://www.mydomain.com/jamaffiliates/sale.php?amount=' . $commissionable_order_formatted . '&trans_id=' . $order_summary['order_number'] . '&custom_mid=' . $_COOKIE['jrox'] . **"&currency=$_SESSION['currency']"**);

Thanks, all sorted.