[Ken Maltby]

Interesting, playing with my new Note 2, looking at this issue, I found a way to do this using the KOReader screensaving function and then going to where it was stored in the Note 2's "Storage" and long pressing on the file's entry. This gave me a box with an option to set as screensaver, for the Note 2. So you can't actually have KOReader manage the screensaving on this Android device, but you can have it provide the image file, that the OS can offer to make it one of the screensaving options.

One thing I would like though is for KOReader to allow for taking the screenshot when the selected image is shown at full screen.

Luck;
Ken

P.S.; Playing in KOReader's crop and zoom functions for the Reader (epub) on the cover page, I was able to take a screen shot that had the cover image fill most of the screen. This KOReader screen shot, mostly of the cover image, I then could make this one of the screensaver images, for the Note2.