In part 1 I summarized how I took three mains shots (vertically) of the waterfall and took an extra shot of the upper portion to expose for the sky.
After downloading the images onto my PC, I tweaked basic exposure settings in Lightroom making sure that the tweaks were synchronized for images 1-3.
Then using Photoshop CS3, I blended images 3 and 4 to improve the exposure of the sky and ridgeline. This was done by opening both images and using the move tool, dragging image 4 into image 3. Holding the shift key as you do this ensures that both images align. Then I applied a black adjustment mask and painted in the areas of the sky that I wanted.
This was the result; Image 3a - blended sky
The next step was to remove any pixel noise by processing the three images in Noise Ninja, again making sure that the same settings were applied to all three images.
The 3 images were then stitched using the panorama blend tool in Photoshop CS3 to create a single image. After stitching, blending and cropping the image, I applied some further enhancement in Photoshop to improve contrast, sharpness and clarity to produce the final result.
Hope this little tutorial is of some use... enjoy...