Hi!
You can either:
- Just download the file and put the folder into the one containing your Ren'py projects. Then you can open it from the launcher and edit as needed (you can rename it, add your script etc.)
- Download the file and then copy paste the following into your project.
- screens and gui folders
- styles.rpy
- From the original project you won't need the screens.rpy and gui.rpy or the contents of the gui folder. Please make a copy of your project before you delete/copy anything though! Just in case.