Use a program like this one:
load object filename,1
perform checklist for object limbs 1
for c=0 to (checklist quantity()-1)
text 0,20+(c*20),Checklist string$(c)
text 150,20+(c*20),checklist value a(c)
text 300,20+(c*20),checklist value b(c)
text 450,20+(c*20),checklist value c(c)
text 600,20+(c*20),checklist value d(c)
next c
wait key
This will show you the names of, and some information about, the limbs in your model. Use this info to figure out the limb number of the figure's torso. After you know this number, you can use it to rotate only that limb instead of the whole object.
Edit: If the character doesn't have seperate limbs, you will have to reanimate it or get a new one. But being from the FPS Creator model pack, it probably should.
"Ok, so that wasn't funny. I don' have any good Christmas jokes."