Hi thanks for your replies, yes I am set to disabled already, and I tried changing the iso settings to 300 just to see what would happen, but nothing did. So I'm not sure the auto iso in chdk is doing anything. Perhaps there's some other setting that also needs to be activated.
I'm not sure what to make of the two links but I'll look at them further. Is there a way to set just some things back to default on chdk? Just the iso settings?
I'm going to be wading through all this for awhile before I understand the basics of chdk, but I taught myself photoshop so I'm confident I can find my way through this eventually.
I don't mind setting my own iso in some situations, but indoors it would be nice to set it on auto and cap it at 400 or 600 when it gets too noisy.
So I'm still hoping for words of wisdom on this auto iso though I may move on too to try to understand changing shutter speed and I don't think on my camera I can change aperture at all through any means except through zooming.