Thanks Frozenen, the "Enigma vb" option looks like the best way.
Anyway, the cmd its a quick solution
EDIT: the CMD solution freezes eventually the new exe. I though maybe, only the Enigma would works. I have tested it with the trial version and then I realize that it only protects executables files. There is NO posibilities to hide "package.nw" from users.
Any other option??