Is it possible to perform copy-paste only "Scenery" & "Texture" folders from old HDD into new HDD to run your products properly?
Obviously not.
There's only one way to install the scenery, and it's only by running its installer, and following the Reinstall methods explained in the install guide, named fsdt_install_guide.pdf, to be found under the FS\fsdreamteam folder after installing the scenery, or in the sticky post here:
http://www.fsdreamteam.com/forum/index.php?topic=649.0I want not to fulfill registry with many garbage entries hard to clean or remove afterwards.
The only "garbage" inserted in the registry, it's your Serial Number activation which of course is needed otherwise the scenery wouldn't work. And, like any Windows program, the name of the uninstaller.
The Serial Number is not removed if you uninstall the scenery, so you will not lose your activation even in case you need to uninstall the scenery and/or flight sim. That's the only "garbage" that is purposely and rightfully left in the registry after uninstalling.