High. I only have one motivation for using CHDK: It drives me crazy on my PowerShot G15 I always lose the exposure lock button whenever I turn on the flash. I want to assign the flash exposure lock function to another button and have the exposure lock always work on one button regardless if the flash is on or off. Can I do this with CHDK? thank you for your help
No, there is currently no way to do this with CHDK.
You could make your own custom build that re-maps the keys (or do something really hokey with a script), but I don't think that would help you in this case, because the underlying meaning of the button changes.