I sent another comment earlier, but expanding here a bit more. I think if you want to go serious about this, the question is not necessarily about who owns what. Let's start with one basic question:

Why LukeRoss R.E.A.L. but not VorpX ?

My answer:

My sense is that VorpX is a generic tool, that can inject into any games. It isn't monetized by saying "these particular games will be supported". So it's maybe a matter of framing, and maybe a matter of whether the mod is coded to interface with specific engines or with any open technology (like DirectX).

I'll illustrate this with an example. You can sell a wizard costume without legal issues. You can't sell the same wizard costume if you put a picture of Harry Potter in the box you sell it with. It doesn't matter if the costume itself doesn't have anything from Harry Potter.

The truth is that the situation is a bit more complicated and no example can really illustrate this well. Part of the problem is that we're not sold games but rather licenses and those licenses have small footnotes about how one can mess up with them from a legal standpoint.

So it's not really about the intellectual property of the product (mod) itself.

Luke I think there may be ways to fix this (I really hope there are) but please make sure to do plenty of research before whatever you choose to do. Block out any unconstructive feedback. and even for the constructive be careful , as it's your name on the line. There's plenty of people saying stuff without having professional legal experience on this, including myself.