Feature Request: Choose Header for entire Chapter

I’m using Easel with Comic easel, which uses “chapters” instead of categories. There’s a section when modifying the chapter to select the header for its archived pages, but I would love it if there was an easy button to be able to select a chapter for all posts in a certain chapter. That way I wouldn’t have to necessarily change the header per POST, but for each chapter as I use the headers as almost book “covers” for each chapter I post.

http://wordpress.org/extend/plugins/wp-display-header/