Hi guys.
I did a very small but very useful blender script called “UVUtility”. This is a very helpful thing for game engines. It can move/remove/setActive/rename UVMaps.
And the most important for me feature it can change UVIndexes.
Script can be applied to selected objects. It means you can change UVs of 100000 objects with one click. 
The script was added into blender official release. Youcan download bightlies and activate it.
Forum: http://blenderartists.org/forum/showthread.php?320630-UV-Utility-(Addon)
VideoTest:
[video]http://www.youtube.com/watch?v=FnFx4WXJbCI[/video]