Hi,
There is no option for that in hikashop.
However, it's not impossible. If you know PHP, you can edit the paypal plugin file ( plugins/hikashoppayment/paypal.php ) and add the necessary information to the email in the $body variable near the end of the function onPaymentNotification. You will first have to use the code below to load all the necessary information in the $dbOrder object:
$orderClass->loadAddress($dbOrder->order_shipping_address_id,$dbOrder,'shipping','name','frontcomp');
$orderClass->loadAddress($dbOrder->order_billing_address_id,$dbOrder,'billing','name','frontcomp');
$orderClass->loadProducts($dbOrder);