For those users who may still want the option to create a set (max 100) of screensavers from selected covers in their Calibre library...
My
Calibre Copy Cover plugin has now been updated to support NiLuJe's changes to this Custom Screensaver hack for Kindle Touch/Paperwhite. The Calibre covers will automatically be sent to the correct Kindle directory (/linkss/screensavers) at the correct size & format (png) with names bg_medium_ssNN.png (NN=00-99).
As always, users have the choice to keep aspect ratio or not. As of this latest release, all Kindle users (Kindle 2/3/4/DXG/Touch/PW) who choose 'keep aspect ratio' will have the screensaver images automatically 'padded' with white sidebars to full screen-size so that the previous screen isn't visible in the background.
If there are any problems please post in the plugin's main thread (see above link).
Regards, Jackie
Thanks to Akirainblack for testing on Touch & PW and to NiLuJe for speedy replies to dumb questions