Thinking about PTI, how easy, I wonder, would it be to do this: there is no PTI on the map, all provinces are there. However, they cannot all be discovered. Each province or each region has a soft coded date, before which, no conquistador/explorer is allowed to enter it. That would be the only limit, so if you already knew about the province, there would be no effect apart from it being out of bounds to discoverers. This would avoid EU2's anomaly of countries like Kongo not being able to see what's right next to them while sending conquistadors to other places thousands of miles away. Some regions could effectively be PTI because their discover-able-ness dates would be after 1789, but they could be modded away, and it wouldn't necessarily prevent exotic nations knowing about them already.