Bank Details in Confirmation Email

Hi Nicholas,
I've read most of the forum on this subject for bank transfer payment options to include bank details in confirmation email but I'm not very good with code.I've tried inserting the code below in Systems-->Emails

if($data->order_payment_method=="banktransfer"){
echo "bank information";
}
and

$paymentClass = hikashop::get('class.payment');
$payment = $paymentClass->get($data->order_payment_id);
$payment->payment_params = unserialize($payment->payment_params);
echo $payment->payment_params->information;

This results in a blank screen during the final checkout process. Can you please tell me...

1. Which notification emails needs to be changed at System-->Emails?
2. Where exactly to place the code? I know you mentioned 'somewhere below' but can you show an exact position with code?

Thanks

Hi Nicolas, sorry for this late response.

So I went back to ORDER_CREATION_NOTIFICATION_SUBJECT at Systems--->Emails and add the code at the bottom and no blank screen but still no bank details

if(!$app->isAdmin()){
echo JText::_('ORDER_VALID_AFTER_PAYMENT')."\n\n";
echo JText::sprintf('THANK_YOU_FOR_YOUR_ORDER',HIKASHOP_LIVE)."\n\n";
}
echo str_replace('<br/>',"\n",JText::sprintf('BEST_REGARDS_CUSTOMER',$mail->from_name));?>
<?php
$paymentClass = hikashop::get('class.payment');
$payment = $paymentClass->get($data->order_payment_id);
$payment->payment_params = unserialize($payment->payment_params);
echo $payment->payment_params->information;
?> "

Nicolas, just edited the language files since I only have one payment method - bank transfer as follows ORDER_VALID_AFTER_PAYMENT="Your order will be processed as soon as we receive your payment.<br/><b>The Bank Name</b> <br/>
Subname<br/>
Account Number: XXXXXXXXX <br/>
IBAN: XXXXXXXXXXXXXX <br/>
BIC: XXXXXXX <br/>
<br/>"

So that seems to add the bank details to the confirmation email. Can you tell me if this will work generally for all email including outlook etc.