your ATL image; the repeating 3 images will give you an error without a pause between the images
image enokkyscenegallery1"
"enokkysexscene1"
pause 0.25
"enokkysexscene2"
pause 0.25
just add it in
gallery_items.append(GalleryItem("Image 5", ["enokkyscenegallery1"] ))
as a side note the project that you downloaded for this is the tutorial for it (dump its contents in your project folder and launch it)
but basically to unlock an image that is not used in the script, just do a quick show and hide of it like this
show enokkyscenegallery1
hide enokkyscenegallery1
that will NOT even flash the image or show the image at all, but it will unlock it for the gallery