AFAIK we know very little about the way one would do that. It's hard enough to make jump-points go where you'd like (and we can't even do that properly)... I don't believe anyone has ever *added* a system.
They said the speed of sound... couldn't be broken... and it never was. But I did get it so you can fly a little man in Privateer 2. ANd if I can do that, by god, I can do anything!
I believe HCl has managed to successfully add a jump point (see one of his Priv missions). Adding another system would of course be tougher, but is definitely possible. Comparing Priv and RF is definitely a very good way to start.
That's what I was talking about earlier... he figured out how to make them, however, he couldn't link them on the other side so you end up in the middle of the other system nowhere near a nav-point.
Hmm... could you cut down your sig length, please? The acceptable size is 4 lines. It's rather odd when your sig takes up 8 times the space that your post does .
Just for the record, there is one add-on P1 mission that I know of for the floppy version. 15 waves of a single steltek come at you. It's on HCl's site if anyone wants to look at it.