NifSkope isn't a 3d editor, it's focus is being able to see and change the data in the files.
That said, one can import an .obj into it and craft a working file, yes.
Thank you, and yes i know. I just do not know how to do it. I downloaded a niftscripts, python, and all the other necessary components the other day, but then it made me download blender 2.49b. The only kinds of NIFs i could export were to oblivion, fallout3, morrowind, and other games, but no skyrim.