You Have to rename them. Just drop the ICE and add _v#.
Were the # should be 2. example (TGV_DIFF_v2)
The first two versions are firaxis (.diff-.diff_v1)
Unless there is three versions ingame already,
then you would need _v3
Its kool about the files , E is on vacation when he gets back.
I plan on getting the files from him,
http://eilelwen.com/phpBB/index.php
Hopefuly I got enough time tonight to see it in game
So I know were to go with the skin. Once I have the >kmf,niff files
It will make it alot easier
( Iam into the Early 1900 century on you map
When the tgv releases ingame ill save it then work on makking it better!!)