Do you use the CHDK software? If so, what all do you do with it? I use it, but so far only for the battery indicator (shows the percentage of battery life left). For those that don't know you can read more about it here: http://chdk.wikia.com/wiki/CHDK Also, no this software does not replace the original firmware on the camera. It's simply a program that runs from the SD Card that is used to store your photos.