Wing Commander Technical Manual?

Hi there.
I have a question for the community to see if you can help me.
Some time ago I downloaded a pdf document that was a technical guide to the Wing Commander universe and I am convinced that I downloaded it from this page, wcnews, I have lost the file and I'm unable to find it again.

It was a document with different articles on WC technology, such as how jump points were discovered; the first page was a hand drawing of a spaceship, I think it was a book that never got published and was still on WIP.

Does anyone know the document and know where I can get it again?
Thanks in advance.