I found some time to paint my copy of the Darksword Gregor Clegane. As I told you, the model itself is way to big to use it alongside "proper" 28mm miniatures. I nevertheless based Ser Gregor the Impetus way.
I chose to use the monster rules of the fantasy expansion of Impetus. This should fit his character pretty well.MassiveVoodoo and was pretty impressed by it. I don't think there is an easier way to get such convincing results.