Help with DotA 2 Workshop, please!

I have been making a Dagger, I modelled it, 350 Triangles, as it asked, 1 material, I need some help now:
How to rig correctly to the body (Rikimaru);
How to make the textures (I have the UV, I want to know HOW to put in _Normal, _Color, _Mask1 and _Mask2, all of them .TGA;
And how to export as SMD, because it gives me an error, I tried fixing, no success, I used to export as FBX, the Dagger gets invisible in-game.
Thanks for the attention.