.nif exporter/converter

I am relatively new to the 3D modeling world and I came across this program (blender) in my search for making new objects/mods for Morrowind. I searched around and found the .nif import/export script and all the necessary python things (PPYFI or something like that) to get it to work. However, I can’t seem to be able to actually export a completely new file (with the .blend extension) into the .nif format which is used in Morrowind.

I’m sorry my tab key double posted this. more info is in the other one. (you can tell I’m a noob can’t you)