For those who don't like the sometimes hideous dead authors presented by Kindle, you can load the
latest English language preconfigured Duokan and put in your own images of questionable taste.
Duokan reads jpg files from the ./DK_System/Savers directory. They've included one image in the latest release, a cute bunny with a caligraphy brush, appropriate for Easter, I guess, but you can easily make your own images.
824x1200 fills the screen on a DX/DXG.
It looks like Duokan selects the images at random. If there is only one image, it will come up every time.