Originally posted by graphicgr8s JP why do you want to do it? What is the final objective?
That's to "blend" two copies of the same image, but as Mark mentions in a later post, "RAW is RAW", period, and I can fully understand that now. Once you tweak the image and save it, it doesn't save in RAW .... you have the choice: JPEG, TIFF, etc ...
I thought that this would have been possible but ... RAW is RAW!
So, I will just use two copies of one single image and "blend" them. Not HDR, rather a sort of Shadow/Highlights adjustment on each copy, then "blend" them together. This can be done in CS4, I suppose, or easily with Photomatix.
Frankly, I was trying to do the impossible.
JP