I've tried for a few hours to no resolution to pass the cart_id and the order total parameter values to a custom script.
Basically this is how it will appear on the page;
cartid="value of order_id"
amount="order total"
This will be in the order_message.tpl file.
This is the order payment thank you page
http://www.sitename.com/xcart/cart.php?mode=order_message&orderids=50
I would appreciate any help on this.
Thanks.