Hi,
Many of those headings are actually images and not text, usually an Auctiva hosted .GIF image.
If it is, you can create a Custom Template from the original and replace the .GIF image with your own text with appropriate Fonts and Colors.
If it's not (is text), you can still create a Custom Template from the original and update their text with appropriate Fonts and Colors.
In either situation, a Custom Template is the way to go. Normally, the image or text is directly in front of it's associated [..TAG..] on the Template, e.g. [SHIPPING]. Usually, the image will have a name format that's consistent with use, e.g. ...templatename_ship.gif for the Shipping section.
Hope that helps.
Danno