It is possible to make the lightsaber not shining?When yes, how?

What do you mean by "not shining?" If you mean the glow, just take a look at the lightsaber's odf. It should be self-explanatory which parameter you need to edit (or remove).

You could also try skinning out the glow in the lightsaber's skin (if that's what you mean by glow).

no i change the tga file to make a sword, to black and grey, but the grey looks so white shining in the game

a lightsaber blade will always glow
you can only make the blade invisible to ger rid of the glow, but since youve skinned it that wont work

To get a sword you need to make a custom msh. Check out the released assets, there's a couple swords already released (and one metal rod).