I'm not sure if you use gimp or photoshop
In gimp, select the top half of the tutorial and CTRL+SHIFT+C ; CTRL+SHIFT+V
This will give you a new image containing only the top half of your tut. Repeat for the bottom.
In photoshop, I don't know. Use something similar i guess.
Then upload both files to photobucket and enter them as
top image [ENTER]
bottom image
That should work!
EDIT: Or use Jamie's way.