A method of loading a film assembly comprising a first film container (13) which may be a conventional film cassette and an additional film container (15, 102, 202, 302, 402, 502) having a length of film wound in one of the containers and extending to the other, comprises the steps of: (a) providing a coiled length of film which may be a bulk roll (52) and attaching a free end to a film winding tool (34); (b) rotating the film winding tool (34) to wind the film into a coil about the tool (34); (c) before or after step (b), enclosing the coil in the additional film container (15, 102, 202, 302, 402, 502) so that the film extends through a film slot thereof, and removing the film winding tool (34). The invention also resides in a film container for use in the method, and in an assembly so formed.