Finally I got a simplistic Screenshot from my problem: On the right side there is this small array of planes and the planes on the left side are supposed to get aligned to it in transformation and rotation. It's not about mapping the faces/planes once again but aligning the position and rotation (maybe scale too). I hope…
So you have a tree full of planes and you want to replace the planes with other planes? I'm guessing because the original planes where not UV mapped and you want to unwrap new planes and replace the old? If that's the case, you could probably unwrap the planes with the "UVW Map" modifier (not the same as UVW Unwrap) and…