That's not the right skeleton for FPSC. Here, dunno if I'm gunna get killed, but hey it's in every model.
For a character, export it and map it like Mazz said then through MS3D use the
Import>Wavefront OBJ File(UV Only) so it only imports the UV Coordinates. Then export it as .x and use the home-made FPSC entity creator and select character.
BUT before you do all that FPSC-ready stuff,
MAKE SURE THE BONES ARE RIGGED TO THE RIGHT FACES/VERTEXES while
IN MILKSHAPE.
BTW: FPSC can only handle so many triangles. If that thing is too high quality, FPSC will die. A character should have no more than 2000 and maybe a boss with absolutely no more than 3000.
If you understood nothing I said, google a few terms and a few tutorials and come back.

- You know you're curious