Tested on the S3IS, A540 (CHDK beta build), A570, A720 If you stack (around five is a good number) photos, you can virtually eliminate noise - by stacking them in PS. This script will take as many repeating shots as you want, bracketing the currently selected LEFT/RIGHT action by as many steps as you select. In Manual Mode, that'll be for Shutter Speed - but you could use it in any mode, as long as you had 'Exposure adjustment' in focus on the screen. Script Code (save as "hdr-stack.bas" to your /SCRIPTS/ folder)