I want to assume you can technically already rearrange the world, I assumed the collision data/bsp data/ and coord data was purely in the chunk itself, at least it seems to be that way at least on sr1 because I can use any city file and cords stay the same in that chunk but I mean they would kinda have to be otherwise random objects in the chunk would be missing and placed elsewhere in the world. So with this assumption the whole collision map should be movable but all of that is beyond my knowledge haha so I could be wrong in the end