I am encountering a problem when trying to make alien sprite sheets: the tool I use to extract the images makes every unit on the sprite sheet into a single image. I can use Falko's Sprite Combiner to merge the images into a spritesheet, however I need to know how many rows each alien has in their spritesheet, because it's different for every one. Is there some guide somewhere I can use to find out what each arbitrary value is?
FYI Falko's script says "rows", in the setting when creating the merged sheet, but it is actually columns.