you can use robots.txt to disallow indexing of certain pages, here is an example of how it is done
# robots.txt
User-agent: *
Disallow: /myfolder/mypage.
html
Disallow: /
cgi-bin/
Sitemap:
http://www.yoursite.com/sitemap.gz
this will generate one for you
http://www.mcanerin.com/EN/search-engine/robots-txt.asp
if you dont know anything about robots.txt, search on google to find out exacelly what it is for