Images are in unnamed_25--->unnamed_29,there are "hidden" files that GGS doesn't recognize,but, once you export them with an hex editor,you can edit them with GGS...
for example,in unnamed_25 the block to extract goes from offset 3AF0 to 1266B0;once you save this block of data,you will be able to open it with GGS
Unnamed_23 contains data about the texture to load and the effect used in adboards,such as "Slide from left","Rotate","Scroll from Left"..this time Konami made a good adboards system,so real.