>>3078432in your case it's not something a preset can help you.
looking at the exif, you made some basic mistake. first of all:
you can't shot at iso 800, expecially on a GF3, you have to shot at ISO 100 to gain the best image quality
45mm is not a suggested lens for scanning films, you need a longer one (70mm 90mm i.e) to avoid distorsion
sei italiano? io si, se ti servono dritte ne parliamo in privato
