Sorry Nels, I was referring to the files, after unzipping, USA Texture files are for the most part the same as what FSX has installed. Named the same, ie, Microsoft Flight simulator X /Scenery/World/Texture/004a2fa1, this is a file that is also on one of the unzipped "USA Ground Textures" any many more. Is it normal when upgrading some scenery texture that I overwrite the same file, as the computer asks, when installing the unzipped files. I am not familiar with how some of you write scenery files. And there lots to download, I pick the ones that are in my area of flying, Is it the norm that a file has been re-coded and named the same, or is the norm that a new file is created.
I know Airplane files are different, Panels have some of the same.