du to "jet lag" ... i worked yersterday evenning with the idea of Waterwings:
> programming CHDK to start the script when "alt" is pressed.
> the simpliest script ever written : "shoot" (I will enter the CHDK's guiness book !)
consequence: I must press twice "alt" to take a photo but it is better than nothing.
>> I am able to use my camera underwater again !.
now, i will improve with your ideas.
once again thanks
i will give some news , once tested in real life.