Thanks to everyone !!! After all I figure out that you can apply normal and specular even after upload the mesh...
So, how I managed this...
- Upload the mesh and include textures
- Upload the normals/specular
- Select each material texture PER FACE and then apply the normals
When I started this topic I did't know that when you upload a mesh with textures, this will create a folder containing the difuses for the mesh. Also I did't know that each material on the mesh means "face" in comparison with standard prims. So, you can, for example edit the texture of a mesh, select tecture edit per face and when you click, for example, in a marble texture, all the marbles aill be selected all at once all over the mesh.
And by the say..this is the final result
After all, all of this was my lack of knowsledge how mesh behaves in SL But I really appreciate all the support that I received. Incredible community !!!