Is it possible to add a "GAIN" value to each RAW being averaged (a-la D40 NIKON Image Overlay feature)?
The gain should be in the range 0.1-2.0 with 1.0 being the linear curve.
This will allow better in-camera HDR as well as effects such as "RAW D-lighting" in-camera (by averaging the same RAW selected twice with different gains).
mkmenuts