integrate Tomcat and Apache

Hello,
I am new to Apache. I followed the directions in the following link
http://www.johnturner.com/howto/winxp-howto.html
and passed all the verification steps ("Checking Your Installation") at the end, especially I was able to get the same static page by pointing to http://localhost:8080/examples/jsp/index.html (my Tomcat4.1.18 port=8080) and http://localhost/examples/jsp/index.html (my Apache port=80). However, though the servlet ran without problem at http://localhost:8080/servlet/HelloWorld, I was unable to get redirected from Apache if I pointed to http://localhost/servlet/HelloWorld. Could someone please help?
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Error msg
Not Found
The requested URL /servlet/HelloWorld was not found on this server.

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Apache/2.0.44 (Win32) Server at localhost Port 80

take a look at:
http://jakarta.apache.org/tomcat/tomcat-4.1-doc/jk2/jk2/vhosthowto.html