CHDK loads from a camera's SD card into the camera's RAM memory. It extends the functionality of the camera without changing (flashing) the camera's firmware. Two methods are available to load CHDK into camera memory: the Firmware Update Method and the Bootable SD Card Method. Read the descriptions below to understand the strengths and weaknesses of each method and the step required to configure your SD card for each method. File:SDcardunlocked.png Prior to starting to use CHDK, you will need to: