This tutorial assumes some knowledge in using Nick Hod's "AeroScenery". I'm no expert by the way and the little knowledge that I have gained has been due to burning a lot of midnight oil and drinking lots of tea, very British.
La Gomera Island I have used for this tutorial.
My settings in "AeroScenery"
On completion of the image downloads you need to open your photo editor, I use the FREE Paint.Net which works perfectly OK.
You then import the "stitched images" from the download map folder created by !AeroScenery".
Then the editing begins.
Set the colours to edit to R=10, G=20 and B=30.
Using the paintbrush these are the edited images.
The above shows the process of editing and on completion save the changes.
Once you have edited all the images of the download you can then process the scenery in "AeroScenery" using "Run GeoConvert".
To save hard drive space I delete all the files leaving only the "geoconvert ttc" files in the map folders.