I am not sure how its works so that is why I pull planes out of my install to keep certain sets. That way I know I will encounter what I want. That file mover program swambast made does the trick nicely. When he gets back from his trip I will ask him to release it. It is a miracle program, straight forward, easy to use and it even remembers where your folders are and what you moved. Also I think you can even make set and transfer them at one time. I am still messing with it though. Sorry didnt mean to derail your thread. But yes by pulling out certain planes you can make that happen. Then do forget to save the mission when you are done then you can do it again at your leisure.