Thanks to the kind person that helped me get my option-key working. GraphicConverter and NIH-Image both seem to need GetPictInfo or GetPixMapInfo to build a 256 color LUT for a 24 bit color image. Executor crashes on these traps. Does anyone have a lead on the code for the "popularity" or "median cut" algorithms to do this? Combining 3 stacked (R,G,B) images was one thing I wanted to do. Scott