Apparently no one is interested , never mine i´ll post it any ways.
The normal texture is something like a thin layer of luminosity but it can be done easily, the easiest way is by opening a normal.texture from a similar unit and delete everything, and save it as your unit name.norm.dds .
the other way is a little more complexe but it has really good results.
1. Open the texture dds with gimp "remember you need the normal plug in"
2. Click filter menu, scroll own to map , then to normal map.
3. Now the normalmap window is open , on the right there is Filter set it up in sobel 3x3.
In Minimun Z : 0.15
Scale:2.00000
Height source: Alpha
Alpha channel: inverse height
in option tab click on " wrap "
4 . click ok and save the file as norm.dds
That´s it.