STEFAN DON'T!
Most of us Ganiers are used to the current one.
The only thing that should be added to it is an easier way to pick the area of which you want an image (choose the imagename + sprite list #, then have a new window pop up asking for the area u want, where you click + drag to form a square in which the area is selected inside, then ur done. MUCH EASIER FOR IMPORTING
) and more free will to it (like add up to 24 bit tolerance)