How can I replace a texture on the "Static Object"?

[Makiavel]

Wait, don't static objects have their models in .dae format?
I tried to do what you told me with the entity, since their models are in .ent format and I can open them with model editor. I copy the files, changed the material in the model editor (in model editor it looked just the way I want), but when I try to use the entity in the level editor or the game, I see the original texture. And when I open the model in model editor again, I see the original texture and the "material" field is empty.