I tried to install the mod using your batch file as well and still have the "Documents and Settings\Mis Documentos" additionally to my "Dokumente und Einstellungen\Saschkin\Eigene Dateien"
Notice how the User is missing in the path?
However, i do not have any problems, my Civ is ignoring anything on partition C:\ altogether and is only saving screenshots there. (this is why i had to install manually as well)
My only idea left would be to delete the "Mis Documentos" folder if you already havent and check for civ files beforehand (especially .ini and possibly .dll files) or switch your Windows to spanish language for a try (you get the idea) but this is just a vague guess and i do not claim to have any understanding of the problem at all...