Directory: Add verbiage to payment page for PayPal

Hi there - I need to add the verbiage "A PayPal account IS NOT REQUIRED to purchase a listing. Visa, Mastercard, & Discover accepted" to the payment page that shows the PayPal button. It's been my experience that without this verbiage placed PROMINENTLY on a payment page that many are discouraged from purchasing. I would also like to add images for Visa Mastercard Discover as well. How do I do that?