I was surprised it worked so well on something that large, I had seen it done for Macro images, and they were amazing, someone also tried it with cars, so I was so impressed I decided to give it a go. It was actually quite simple.
Star at the edge of the subject and keep moving the focus inward ever so slightly depending on the complexity of the subject until you have a series of images that covers every point of the subject. Granted they advise you to use a tripod, but as I explained, I wasn't going to sneak up behind that gator with a 5.5ft tripod lol, but i tend to have a steady hand and knelt down bracing my elbow on my knee. Photoshop was able to align then without an issue. Not sure what to try it on next
but i will find something that stays still long enough eventually. There is a tutorial inside this forum, it was a little complicated for me because I simply cant understand light-room, it annoyed me so bad I swore at it, then off it. I like PS Cs4 though.