Unfortunately parts creation is difficult and poorly documented. Most of the stuff out there are for older versions of Fritzing and thus not necessarily applicable. These two sets are both about 0.9.3b and may or may not help (really only trying and asking for help in here when you are stuck works). As well I’m looking at making a part for your fm board, as it appears no one has ever released one (there are pictures of one around, but not the part itself).