User-agent: *
Disallow: /img/
Disallow: /css/
Disallow: /about/contact.html
Disallow: /about/contact_at.html
Disallow: /404.html
Disallow: /404_at.html
Disallow: /*_sm.jpg$
Disallow: /*_lg.jpg$

User-agent: Googlebot
Disallow: /*_sm.jpg$
Disallow: /*_lg.jpg$