Hello,
I don't really have much experience with CHDK. used it a bit on my A1000 in the past, to unlock RAW-files. But not much else.
I got pretty much the same problem. My G12's Playback-button is broken, which is quite an inconvenience. This post lightened up my mood a bit, thinking "hey, putting the function on another button, would be nice". But then i started wondering: "How exactly do i even get CHDK working on my camera without the playback-button?" Maybe i am wrong, but it seems like all the install-instructions require me to use the playback-b. No PB=>No CHDK=>No button-change. Or is there a way to go around it?
thx in advance