Hi, this should be simple but I'm really struggling...

I have a page on my site that has 5 products with Paypal Add to Cart buttons. They work and add the product straight to Paypal. The problem is that the client wants a checkbox saying that the customer has read the terms and conditions.

Nothing I do will work. I've tried various 'solutions' that involved adding a bit of Javascript to the page and then editing the button code. Not only that but when I edit the content box that the products are in and try to edit the HTML the entire block goes grey and can't be edited.

I've looked at Add-ons but I can't see anything suitable other than Paypal Cart Buttons and that seems to have been abandoned. The premium version has not been updated for over 2 years and may have been abandoned as well.

If anyone can tell me the best way to add PayPal buttons I would be very grateful. I would have though there would be a fair few solutions for c5 but I'm stumped.

Thanks in advance.
Dan