Open GraalShop
Click ADD
Type the filename of the image where it says SPRITES
Enter a Description of the sprite like Window
Type in the index of the sprite (use 1 in this case)
In auto-tiling start x and y must be 0
tile width is the width in pixel of the image
tile height is the height in pixel of the image
count x and y ... no idea =\
click ADD
this should add the sprite to the list and you can now put it anywhere on the gani