So do you want to make custom collision for your model in FNV, but the automatic collision generator in NifSkope isn't accurate enough, or you really don't want to learn how to use an ancient build of Blender? Or is it you've had better luck finding bigfoot rather than a copy of 3DSMax 2013?

Well this is for all of you.

Using newer builds of Blender, which you can actually navigate, and NifSkope, you can finally make mesh-accurate collision for your models!

Massive thank you to Pixelhate, Winsmoke and PherimHope, you all helped to make the guide work and then improved upon the original guide to!