@Anjohan why not wait and base your project on the hd version of adywan’s revisited version of a new hope when it comes out?
Shouldn’t be too much of a hustle to replace some video files with whatever upgraded version Adywan releases, but I don’t really think it will be necessary. Adywan’s ANH is “Prequel-supported” and have many great additions to the score and new scenes (that will not be in ANH Revisited HD), so this upscaled version combined with 4k regrade I think will do the trick.