can I add the text provided after paying also in the email that is send?

ob_start();

	if($data->cart->full_total->prices[0]->price_value_with_tax>0)
		echo '<p>' . JText::_('ORDER_VALID_AFTER_PAYMENT') . '</p>';

	if(in_array($data->order_payment_method, array('banktransfer', 'check', 'purchaseorder'))) {
		$amount = $currencyHelper->format($data->cart->full_total->prices[0]->price_value_with_tax, $data->cart->order_currency_id);
		$paymentClass = hikashop_get('class.payment');
		$payment = $paymentClass->get($data->order_payment_id);
		$information = $payment->payment_params->information;
		if(preg_match('#^[a-z0-9_]*$#i',$information)){
			$information = JText::_($information);
		}
		if($data->order_payment_method=='banktransfer'){
			echo '<p>' . JText::sprintf('PLEASE_TRANSFERT_MONEY',$amount).'<br/>'.$information.'<br/>'.JText::sprintf('INCLUDE_ORDER_NUMBER_TO_TRANSFER',$data->order_number) . '</p>';
		}elseif($data->order_payment_method=='check'){
			echo '<p>' . JText::sprintf('PLEASE_SEND_CHECK',$amount).'<br/>'.$information.'<br/>'.JText::sprintf('INCLUDE_ORDER_NUMBER_TO_CHECK',$data->order_number) . '</p>';
		}elseif($data->order_payment_method=='purchaseorder'){
			echo '<p>' . JText::sprintf('PLEASE_SEND_PURCHASEORDER',$amount).'<br/>'.$information.'<br/>'.JText::sprintf('INCLUDE_ORDER_NUMBER_TO_PURCHASEORDER',$data->order_number) . '</p>';
		}
	} else {
		if($data->cart->full_total->prices[0]->price_value_with_tax>0 && hikashop_level(1) && $config->get('allow_payment_button',1)) {
			$pay_url = 'index.php?option=com_hikashop&ctrl=order&task=pay&order_id='.$data->order_id.$url_itemid;
			if(empty($customer->user_cms_id) && !empty($data->order_token)) {
				$pay_url .= '&order_token='.urlencode($data->order_token);
			}
			$pay_url = hikashop_frontendLink($pay_url);
			if($config->get('force_ssl',0) && strpos('https://',$pay_url) === false) {
				$pay_url = str_replace('http://','https://',$pay_url);
			}
			echo '<p><a href="'. $pay_url .'">'.JText::_('PAY_NOW') . '</a></p>';
		}
	}

	$content = ob_get_clean();
	$vars['ORDER_SUMMARY'] .= $content;

<?php 
		$paymentClass = hikashop_get('class.payment');
		$payment = $paymentClass->get($data->order_payment_id);
		$information = $payment->payment_params->information;
		if(preg_match('#^[a-z0-9_]*$#i',$information)){
			$information = JText::_($information);
		}
		echo $information; ?>