Here is a quote about the last thing they had to say about modding:

Originally Posted by Lar_q
I'm afraid the development pipeline of div2 is fairly complicated and I actually can't imagine how we could make it available to you all, but I'll give the coders a big scare on monday and ask them exactly how we could go about it. There is an extensive tool chain with which I think you could do fantastic things, but getting it installed on your hard drives might be too much effort. That said, it's worth contemplating.


-----

It sounds like the problem is it was made to run on their network rather and on a single machine.