Template overrides - Plugins?

Hi,

I'm trying to override a line on the checkout page where next to the payment checkbox, it has a description of the payment.

I have located the php file in plugins>hikashoppayment>paypal>paypal.php

I saved a copy and then I changed the source code on lines 392-393 to read:

				$element->payment_description='<p>You can pay by credit card or paypal using this payment method</p>';
				$element->payment_images='PayPal';