Ixus Wireless SD430 - no crashes, but either I'm too dumb to find it, or despite having the camera in "P" mode rather than "AUTO" mode, I couldn't find any way to set this model with "...ServoAF and ContinuousAF disabled in the Canon shooting menu (if possible)".
There are two sets of results in that file, the first is with an older CHDK version, before I read the instructions properly (it is getting late here
and my brain is too fried for complex instructions, time to sleep I think). The second one is using the very latest CHDK.