I actually coded this layout almost 2 years ago, and haven't worked on it sense, but looking back at my original post, it looks like I included a program that automatically resizes your pics for use with the mini carousel. It might just be that program is messed up, or it was used incorrectly.
My best guess is that it is a file extension error, maybe the code only looks for .jpg and the files are .png or vice versa
Honestly, if I were you, id learn how attract mode uses these images by looking through the code (just open it in notepad++) I remember trying to make my code very readable for the average person, in case they wanted to learn the way I did,( by backwards engineering another layout) so the code is broken up in to many different chunks that are labeled pretty thoroughly. I worked with about 3 other people on some of the graphical effects, and borrowed code from many other layouts, and all are credited within the code so you can look them up in this forum.
Good luck on getting it working!