Hello again. Well if you're going to start a 2nd thread about it, I guess I'll come over here and yell it:
use exiftool.

I know, I know, it's not what you wanted or asked. But I'm trying to help you, I truly am.
And for the record: It
does not "make it much easier to update the exif tags with it when doing a lot of photos." It's quite slow! Judging from the drive LED activity on a single image, I think he's running multiple exiftool calls when it could be done with one, or maybe just AutoIt script execution is slow.
exiftool is faster and vastly more powerful than that "Auto CHDK to Exif" thing exposes, it's simply embarrassing. You could, if you were crazy enough, re-tag, rename, and otherwise manipulate your entire image library, with
one command.
Just from a casual glance at the
documentation of exiftool, you can see it's tagging ability is -the- standard that all image management applications strive for. Nothing can best it.
Nothing. And like all our favorite tools: CHDK,
dcraw, etc. it's Open Source licensed. Yes there's a learning curve. Same with CHDK. Same with dcraw. And when you see what you can automate just with
config files and argfiles...
However - if you are just stuck on using it... as I said above, it's an
AutoIt script, that Barney decompiled and re-worked, which was originally written by aeropic and called
Auto_ISO_Patcher. Anyway, you can do what Barney did. Barney is long gone or more likely hiding under another alias. He's not going to fix it. The AutoIt package comes with a utility called EXE2AUT, so you can extract the script and modify the source code so you can fix any errors or extend functionality...
But really? If you're willing to go to that much trouble, just give exiftool a few hours of your life. Once you learn it, you'll never need another.
