It should not be such an large task with agks commands to do such an tool fast
Simply display sprites in the correct image size with no filter on in the order of the subimage file.
use get image.
use agks save image command.
Keep in mind that the agk app neads then to be in the size of the largest image or actually slightly larger.
I could probably write such an tool in under less then an hour but i have no nead for it
Android 2.3 , ZTE Skate , 480x800 , 800 mhz , Samsung Galaxy Y , 240x320 , 832 mhz , Sony ericson arc 480x854 , 1 ghz
Android 4.0 , Dmtech 3g 9738B , 1024x768 , 9.7 inches , 1.2 ghz