FCMG, who created the 2010 Arena Silverstone based on ISI's circuit, said that they used BTB. But as ISI probably made this in 3DS Max, there would not have been any BTB project files to work from. How would FCMG have done this? It is not a scratch built BTB track, it is just new road added to the existing circuit. In order to run this circuit, you need the ISI Northamptonshire. Is there some kind of rFactor import plugin for BTB?