There are additional animations as an option for you to assign in your characters script, or .fpe for how you may want to have a character act differently from other characters already available.
the extras are there to give you that option.
My suggestion is to rig your character using the tutorial at the top of the forum for milkshape, then export it into FPSC, attach an existing script to it and see how it preforms in game.
Once you start playing around with changing the animations in the .fpe the possibilities of what you can do will be made clear.
I uploaded the animation breakdown for you at this link.
[href=http://www.mediafire.com/file/j2lmnozcjny/animation breakdown complete.txt]http://www.mediafire.com/file/j2lmnozcjny/animation breakdown complete.txt[/href]
"Perception is my reality." Kuro.