Just saw that movie, it was fantastic. A must see for all Gloranthan fan.
It's the adaptation of a french comics from Moebius. It's a western (which is not really Gloranthan I agree) but the western is just the background. All the film is about shamanism.
I never saw the spirit world so masterfully represented, all we've got to see in a adventure in the spirit world was here (bad and good spirits, animal spirits, the magic circles, the transe, ...). There's even a shamanic duel at the end.
Really, I advice you to see it when it goes out near your home. You won't be disappointed.
Cheers,
Fabien
(PS : sorry, my English is far from perfect, I hope I'm still understandable)