Copy UV Islands to another UV set? Can you copy UV islands from one set to another on the same mesh? I have two UVs that are mixed up and I want to separate them.
Maybe UVMagic addon already in Blender. You can copy from objects to other objects, faces etc. its simple to use, hope it helps!
Features

11:40 Copy/Paste UV (Among faces in UV/Image Editor)
0:07 Copy/Paste
UV (Among objects)
0:51 Copy/Paste UV (Among faces in 3D View)
1:51 Transfer UV

Tutorial and feature list here

https://www.youtube.com/watch?v=BKZX3Xac7X4