The main question for me is how to make the bracketed pictures. The rest can be done on the desktop. I have come to the conclusion that a little C is neccecary in order to do this. I compiled a quick and dirty script which uses this C utility and takes a -2, 0, +2 sequence with the current settings in focus and exposure. to run it 1) Place the files contained in the attached file in a non vfat folder eg., ~. 2) Compose and take a picture in with the default camera application. 3) Close camera application without moving the camera too much. 4) Run photo_bracketing.sh from the command line. Wait. the three files will be called rawHDRtest0.png rawHDRtest1.png and rawHDRtest2.png