Jason,
That is working and putting a unique reference in the OrderReferenceID.
The OrderReferenceID is used on the confirmation email like this:
<a href="http://75.103.78.133/public-download.php?OrderReferenceID=<?php echo session_id()?>">http://75.103.78.133/public-download.php?OrderReferenceID=<?php echo session_id()?></a></p><?php } ?>
Can I change the echo session_id() to echo time() ?
thx
Eric