Hi guys.
I did a small addon “UV Utility”. It can help to change indexes of UVMaps and set them active/render_active.
It’s very useful especially for Game engines (Unity, Unreal, Ogre3d…).
Script is applied to all selected objects. So you can change UVs for 100000 objects with one click. 
The script: https://code.google.com/p/blender-addons-by-mifth/source/browse/#hg%2Fuv
WIKI: http://wiki.blender.org/index.php/Extensions:2.6/Py/Scripts/UV/UVUtility
Video:
Thks a lot@mifth,
Your tool is very usable! I’m very glad to share your job!
Bye bye
Spirou4D
Hey guys!
The addon is now in blender! Just download latest nightly builds and enable the addon from blender contributions.
Have fun.
Hi @mifth,
I have problems with your add-on on Blender 2.70 4acb57a RC1 on Vista x86: TRACEBACK:
rna_uiItemO: operator missing srna ‘uvutil.select_index’
C:\Users\Patrick\AppData\Roaming\Blender Foundation\Blender\2.70\scripts\addons\uv_utility.py:95
search for unknown operator ‘UVUTIL_OT_select_name’, ‘uvutil.select_name’
rna_uiItemO: operator missing srna ‘uvutil.select_name’
C:\Users\Patrick\AppData\Roaming\Blender Foundation\Blender\2.70\scripts\addons\uv_utility.py:100
search for unknown operator ‘UVUTIL_OT_remove_active’, ‘uvutil.remove_active’
rna_uiItemO: operator missing srna ‘uvutil.remove_active’
C:\Users\Patrick\AppData\Roaming\Blender Foundation\Blender\2.70\scripts\addons\uv_utility.py:104
search for unknown operator ‘UVUTIL_OT_change_index’, ‘uvutil.change_index’
rna_uiItemO: operator missing srna ‘uvutil.change_index’
C:\Users\Patrick\AppData\Roaming\Blender Foundation\Blender\2.70\scripts\addons\uv_utility.py:87
search for unknown operator ‘UVUTIL_OT_select_index’, ‘uvutil.select_index’
rna_uiItemO: operator missing srna ‘uvutil.select_index’
Hello! Thank you for the report. I did some fixes here:
You can download it here:https://developer.blender.org/file/info/PHID-FILE-kg4sgchkaermqoperlr7/
Or download nightly blender build tomorrow. 
Could you check the addon again?
Hello. I cannot download.