the app itself should tell you what you need and where to put it
http://www.door2windows.com/customizergod/
http://beebom.com/customize-windows-10-icons-customizergod/
if you want windows 10 experience, it is easier to just upgrade for free to windows 10 or buy a new license
most of these customizers eventually mess up the install or makes parts work weird, or just works bad generally, if the installer itself doesn't comes with adware or any other bad surprise added