Hi guys, I've got several thousand placemarks in Google Earth in a range of folders, and then folders within folders. What I'd like to do is change the icons for some of my folders. For exmaple, the default icon is an image of a blue folder. So that I can easily distinguish between different types of folders, I'd like to change the icon to an image of a red folder for some, while keeping others blue.

I know how to change the icon for a placemark - right click on it, select properties and click the button in the upper right corner - but this approach doesn't work for folders. From a quick internet search it seems that I might need to edit the code for the folders, and I don't know how to do that so could someone please post a walkthrough of it, or refer me to another post as chances are other people have had the same problem in the past?

Many thanks