how to put this source code in unreal editor?

here is my modding target project : afee2827f5e4809980ad62aa64013414c07849d1.jpeg . ypIVgqX.jpg .all source code is that 2 folder, not only MyProject2 folder. how to import it to unreal ? in ‘MyProject2’ folder, have ‘unreal project file’. i click on it, and just can open all source in ‘MyProject2’ folder, lost all source file from ‘Engine’ folder. how to import 2 folder in unreal and run unreal project file?