Bom, eu editei assim seguindo exemplos na internet... criei um arquivo: robots.txt contendo o seguinte
User-agent: *
Disallow: /badseocomponent/
Disallow: /index2.php
Disallow: /index.php
Disallow: /option
Disallow: /administrator/
Disallow: /admin
Disallow: /adminisrator
Disallow: /administrator/
Disallow: /adminibator
Disallow: /admin/
Disallow: /admin.html
Disallow: /admin.php
Disallow: /cache/
Disallow: /components/
Disallow: /dmdocuments/
Disallow: /help/
Disallow: /mambots/
Disallow: /remos_downloads/
Disallow: /includes/
Disallow: /installation/
Disallow: /language/
Disallow: /libraries/
Disallow: /media/
Disallow: /modules/
Disallow: /plugins/
Disallow: /templates/
Disallow: /tmp/
Disallow: /xmlrpc/
Disallow: /profiles/
Disallow: /*action=reminder*/
Disallow: /*action=stats*/
Disallow: /*;msg*/
Disallow: /usercss/
Disallow: /installation/
Disallow: /editor/
Não sei se há algo errado, quem souber favor avisar-me!