User-agent: Googlebot 
Disallow: /admin/
Disallow: /includes/
Disallow: /imagenes/
Disallow: /fotos/
Disallow: /anuncios/

User-agent: msnbot 
Disallow: /admin/
Disallow: /includes/
Disallow: /imagenes/
Disallow: /fotos/
Disallow: /anuncios/

User-agent: Slurp 
Disallow: /admin/
Disallow: /includes/
Disallow: /imagenes/
Disallow: /fotos/
Disallow: /anuncios/