In this answer it describes how to set a screensaver image (that shows when the book-reader is switched off/standby).
If you deselect the screensaver the Odyssey shows one of series of (5 or so) images at random. I have not found these pictures as files on the book reader internal memory.
I would like to have my own set of images from which my bookreader would choose, not just the one I can select as with the aforementioned answer.
How can I achieve this? Or alternatively, where do the 'default' images come from (as I think I can figure out how to replace them once I know where they come from)?