Is there a way to add or change the text on the Checkout page? I've had a few people enter their email address incorrectly (.comm vs .com). The email bounced, and they never received what they purchased. I would like to add a note something like "Please check and confirm your email address..." somewhere on the checkout page. Or maybe even a check box saying "yes, I confirmed my address is correct." Also, is there a way to change the receipt subject line? I would like to change it from "Thank you for buying..." to something like "Thank you for Enrolling..." Thank you