Hermit made a new sprite editor. This program can be used on a PC and gives you the opportunity to edit overlay sprites. You can edit 4 x 4 overlay sprites with all of the 16 colors. The program has the following features: Zoom, Move, Load, Save, Convert, Drawing modes: floodfill, lines, circles, rectangles, UNDO, REDO, Shortcut-keys, Command-line, etc. There is also a manual available for SPRedit.