You can explore this very large image by moving the mouse close to the borders of the Stage. To create your "huge single sprite" just follow these directions: 1- follow B-Reyn428's directions in his project http://scratch.mit.edu/projects/B-Reyn428/84741 to create a very large sprite with the picture of the Scratch interface (don't care about this, we are going to remove the picture soon) 2- cut your very large picture in 480x360 squares (or smaller) as Jens did in his project http://scratch.mit.edu/projects/Jens/27625 3- edit the costume of the very large "Scratch interface" sprite and import the single pieces of the image you cutted in advance, then put them aside (the 1 pixel border around the images will disappear as soon as you close the editor) 4- done!!! Now you can also enlarge the image by clicking it (I embedded brinjal's strategy described at http://scratch.mit.edu/projects/brinjal/1508937). When you move the mouse close to the borders the image goes back to size 100%.
Thanks to B-Reyn428's very nice project http://scratch.mit.edu/projects/B-Reyn428/84741 and to Jens' interesting way of creating a large explorable image http://scratch.mit.edu/projects/Jens/27625 by using four different sprites, I created a single very large sprite from a large picture.
