I know this has been suggested before, but I can't get it out of my head. There is such a wealth of data and ships for this game that it could take years to produce just the stuff from HW and HW: Cataclysm alone. And unlike games like Freespace and Wing Commander, it isn't fighter-based, and it is sufficiently different from ACTA to be interesting. Several groups have attempted to make their own, and the general consensus is that the best system would be something like SFB- more detailed than ACTA, but still playable with a fleet.