First check this at
http://www.fpscreator.com/animation_template.html.
Animate like there is said, now you can aply a same FPI Script from another character (lets say: Colonel X) and play with the settings, till you get the frames right. All animations have to be on one .X file.(So you have to convert it.) In the fpi script you will get this: "Example:"
You can follow a whole package of video tutorials on how to animate and make bones in Blender. Just search at
http://www.youtube.com.
Search on Google for Plug-ins. Or Try Milkshape 3D that is the nicest program to convert, I think.
I hope I helped you out.

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