EMC SurfCAM PostFiles?

I am trying SurfCAM2DFree and I have gotten to the
point where I can generate the GCode for the toolpath.
SurfCAM has profiles for some machines such as
Fanul, HAAS, FADAL, Mazatrol and some others, but not
EMC. These profiles customize the GCode output for the dialect
understood by the particular machine.

-Has anyone customized a post profile for EMC?
-Is this even necessary? Is one of the provided profiles
close enough?

BTW, the SurfCAMFree2D tutorial is pretty good.

Thanks
Art