For those people wanting to know how to change the PayPal payment image for the "Submit Payment" button, here is a solution...
When choosing to pay with PayPal there is a button in the form of an image.
ISSUE: This button looks more like a badge, rather than a "clickable" button
Not everyone making a payment would know to click on this image so they can pay.
The PayPal "Submit Payment" button is currently referencing a URL at https://www.paypalobjects.com/en_US/i/bnr/horizon