To change the container heading on the product listing page which is the first page in the buynow module just go into the settings for the container and change the "Title". For all the other pages in the checkout like product details, cart, etc you need to do the following:
- From the host menu choose "Module Definitions"
- Click the pencil next to the "Smith.BuyNow" module
- Scroll to the bottom of the screen and click the pencil next to the control you want to change the title of
- Type whatever title you want in the "Title" textbox.