Would anyone kindly tell me how to fix http://rapidshare.com/files/440186308/ExperimentalPowerArmour_Awesome_.nif...

1) Some of the Bone Indexes seem incorrect (did you copy paste the mesh from one nif into another?) -> Verts SHOULD NEVER be skinned to the Scene Root node and its not even possible to do this naturally through Max, GMax or Blender -> as well several of the meshes just have odd vert assignments like the legs being skinned to the Clavicles ?!? -> there are other instances in that file that reeks of Copy/Paste or VERY Poor skills in whatever 3D app that was used.
Also
2) your texture paths are not relative to the FONV data folder -> Fix Them.
And
3) I would highly suggest getting your steam installation out of your program files folder this is directly needed for all Windows Vista+, as it will do nothing but cause issues later or now.