The ferromagnetic shape memory alloys (FSMA) exhibit phenomena like the magnetocaloric effect and magnetoresistance which are also of technological importance, besides the shape memory effect. These properties are associated with a first order phase transition - the martensitic transformation (MT) – as well as a second order phase transition – order –disorder magnetic transition - which involve structural, magnetic and electronic changes in these alloys. Transport properties connected to the electronic structure, depending on crystal structure and phase transformations may offer a possibility for practical use of FSMAs. In spite of its remarkable properties, Ni2MnGa – the FSMA prototype [1] - is found to suffer from some drawbacks such as relatively low Curie and martensitic transformation temperatures besides a high brittleness. Alternatively, the Ni-Fe-Ga-based alloys have high ductility, attributed to the precipitation of a secondary phase, with FCC type structure, situated at the grain boundary which favors the cohesion between grains. However, after an inappropriate thermal treatment, the FCC phase content increases being positioned also inside the grain and this may inhibit the twin boundary motion and reduce the volume fraction of transformable phase. [2]. Recent reported data [3] have shown that suitable quenching preparation technique, like melt spinning, may prevent the formation of the secondary FCC phase; the higher the cooling rate, the poorer is the crystallinity of the ribbons and the more they preserve their malleability. After careful thermal treatments the precipitation of the secondary FCC phase may be induced and controlled. In the present work, we investigate the influence of this secondary soft magnetic FCC phase on the transport properties and magneto-resistance effect on some Ni-Fe-Ga-X (X= Nd, Al, Cu) Heusler alloys as bulk and as ribbons prepared by melt spinning method.