I'm using a child theme of twentyeleven, and I'd like to replace the default 8 images with my own - and have them rotate as the default images do with the twentyeleven theme.
Some have recommended simply replacing the default images with my own.
My concern about replacing the default images with the new ones in the twentyeleven/images/headers/ directory is that, if/when I were to update the twentyeleven theme, my custom images would be replaced with the defaults.
Also, the twentyeleven_setup() function includes a section that registers the default headers.
a) Am I right about the overwriting issue if/when I update twentyeleven?
b) If so, I'd like to know how to designate a different directory (e.g., childtheme/images/headers/) as the repository of the custom images.
I thought that simply creating that new directory and uploading an image would work; it didn't.