I wrote this guide for my old guild about 2.5 years ago I believe, so perhaps even longer ago.
It's located here: w.ww.exilium-industries. eu/BT (delete spaces obviously)
I'm not sure if this is a guide that is allowed to enter, but I had this one still laying around, so why not!?
(I am able to verify I wrote this guide; still got all the original screenshots/files etc).