Hello & welcome azerty9,
I would like to know if there is a means to load manually the CHDK on A720IS to benefit at the request of the hack?
For example: I start the cmaera, I take photos with the original Canon's firmware, then I want to take a photo in RAW then at this moment I choose to load CHDK. Is it possible ?
No, A720 is a DryOS
-based camera, on this type of cameras the update-firmware - method does not work because there's no way found to create the needed fi2 file for this until now.
The only way to start such cameras is the Autoboot - method (starting from a locked, bootable SD card).
But you can easily switch CHDK on / off by locking / unlocking the SD card:
Card locked -> CHDK starts on power on
Card unlocked -> camera starts "normal", without CHDK
But you have to power off your camera for this...