User-agent: *
Disallow: /images/
Disallow: /navi.htm
Disallow: /navi_preise.htm

User-agent: Googlebot-Image
Disallow: /images/

User-agent: gonzo*
Disallow: /

User-agent: gonzo
Disallow: /

User-agent: franzis/2.0
Disallow: /

User-agent: franzis
Disallow: /