Cool: excellent Image. Nice blurred background.
cool that software might have an option to convert to dng or to tiff. then after that you can edit the image in gimp.
Raw is actually a file with no compression. You had to apply your white balance(optional), saturation(optional), sharpness, brightness contrast etc as per the your choice.
Cool there is a option in chdk menu to covert to dng see if that helps.
Stuge: 1st one is the best and the 5th one is also nicely taken.