Quick and dirty fix, change the canvas size in Photoshop (or whatever photo edit program) to make the picture slightly wider than high, then zoom to 1:1 in the Nokia 770 picture viewer, and voila. Make the original picture 800 pixels wide, and use white or black as a background color to have the extra space clean. It should hardly make any difference kilobyte-wise, since JPEG compresses clean 1 color areas well.