User-Agent: Yandex
Disallow: /download.php
Disallow: /search.php
Disallow: /other_version.php

User-Agent: Googlebot
Disallow: /download.php
Disallow: /search.php
Disallow: /other_version.php

User-agent: StackRambler
Disallow: /download.php
Disallow: /search.php
Disallow: /other_version.php

User-agent: *
Disallow: /download.php
Disallow: /search.php
Disallow: /other_version.php