Oh that made me double check and most of the folders were empty in the CHDK folder. I thought the make firzip would populate that, but apparently it doesn't. So I downloaded the ixus310_elph500 zip and copied the chdk folder over and I get a lot more, splash etc. The initial splash seems to have the white bar still, but things seem to be a bit more 'sensical' now. Still no touch screen. What else should I tinker with?
~Phil