Note: Everything between the ==== lines below
is JUST an example of a robots.txt file
You would need to customize it for your own needs.
This example is one that does NOT want ANY robots to access these directories.
More examples of what can + should be put in this file is at
Danny Sullivan's Search Engine Watch Website at
http://searchenginewatch.com/

Text file needs to be named "robots.txt", and contain ONLY the info (customized for your website)
that is between the ==== lines. Upload to the same location that your
domainname.com/index.html file is at.
==================================================
# /robots.txt file for http://www.your-url.com/
# mail webmaster@your-url.com for constructive criticism

User-agent: *
Disallow: /images/
Disallow: /subdirectory-name/zip/
Disallow: /test/
==================================================

Provided by Roxy's Renditions Web Page Help 
http://autumnweb.com/Roxys/2WebPageHelp/4HintsTips.html