Seemed to disppear again after a Reboot.
Where exactly should I put the .jpg file
I made an extra info directory but it didn't work (buid 7056 X-64).
Must be doing something idiotic.
Should I move the .jpg file to the en_US directory
The instructions don't seem clear (or are ambiguous -- your picture doesn't show an info sub directory at all nor any file with a .jpg extension in it.
(I think I'm reasonably computer litterate but I just can't get this to work any more after the initial one with ctrl_alt_del. Logon just reverts tback to the hideous standard screen again).
I've restored a previous image so there's no "Stardock build" contamination in my system.