@ventilator: thanks, i couldn't remember it myself...

@Impaler: so basically, put this in a fx file:

Code:
technique flatshade
{
	pass p0
	{
		shademode = Flat;
	}
}


then as before mentioned apply that fx file to a skin that is applied to the normals that you want to be flat shaded, or to the main skin of the model itself.

- aka Manslayer101