NRaas Vector...how to create a custom disease?

It was originally envisioned that players would make custom Vector diseases for their own use and to share with others. Much like with custom Uni majors though, this never really happened. It's apparently very difficult to make them.

I thought we had a tutorial of sorts on the subject, but to be fair I can't find it either. Possibly it's one of the pages that hasn't made it over to our new site yet. If you bring the question to us at NRaas, our developer or perhaps another member who has tried this might be better able to assist.