Yes I use Paint Shop Pro 9 I don't know if the same palettes are available in other versions. If you are doing it from two images (a better way to increase dynamic range) you would have to make the adjustment layer by copy and paste from the sky image and use the bottom slider in the Gradient Editor to adjust Opacity.

And every one said, 'If we only live,
We too will go to sea in a Sieve,---
To the hills of the Chankly Bore!'
Far and few, far and few, Are the lands where the Jumblies live;
Their heads are green, and their hands are blue, And they went to sea in a Sieve.

Edward Lear
http://www.nonsenselit.org/Lear/ns/jumblies.html