Thanks you to all the developers of CHDK.
I have just found this group CHDK in the last couple of days & I am very enthusiastic to get started.
I have S2IS f/ware 100g & S5IS f/ware 101b.
I had a lot of trouble finding the Firmware number, but thanks to "ACID" it was a dream once I found you.
I am now making a mini-usb remote shutter release.
Has anyone gone down the path of using a multi-button mouse to operate the camera ? Such as 1/2 press auto-focus, shutter release, zoom in & out, manual focus & macro etc ?