Everything in the "target" directory (the bottom directory in the photofusion dialog). If that directory wasn't where the original, full-scale images were (that's the way I usually do it), then you'll need to copy the original images from the top directory in the dialog over too.
Basically:
index.php, aerial.jpg, topo.jpg, profile.bmp, and th_*.jpg
from the original source dir:
*.jpg