User-agent: googlebot
Disallow: *.jpg
Disallow: *.jpeg
Disallow: *.gif
Disallow: *.mpeg
Disallow: *.mpg
Disallow: *.wmv
User-agent: Mediapartners-Google*
Disallow:
User-agent: * 
Disallow: /z/
Disallow: /ztemplates/