I did what I know but the rainbow is a goner.
I color corrected;
Using the magic wand. The Magic wand isolates the areas you want to work on. Created a new layer for the sky and lake then I corrected the image with Levels, Vibrance, Hue Saturation and color balance.
To get the results that I got or better, you must use photoshop. As mentioned above, fireworks is not an image editing program.
Good luck TeamSamba
I am still learning. If anyone knows where my skills need to be sharpened, let me know which course to buy