I know it is available freely in AssetStore but it require 5.2.0 or higher version.
Recently I am working on 4.6+ version and don’t want to move now for 5+ version.
I want to use resources of this project so if anyone can share resources of this project than it is big help for me.
In others words you cant . Unity 5x documentation is different than unity 4x . If you import 5x Asset pack in 4x or lower it will throw errors. To use it you either need to update to 5x + or else you can download other asset pack which are are supported to 4x version.