After some trial and error, succeded installing the CHDK for my camera,(D version 2011+), via play mode/firm.update. The PC utility formatted my 4GB card to FAT16(vers.req wouldn't work otherwise, after that func+dips short press worked). Is it ok if I format back to FAT32? I understand I have to leave the CHDK files on card.
For me, it was perfect if I could just mod the stock fw to support zoom while recording video, maybe remove movie length cap and adding panorama.