Where to get mod_webapp

[Li Lin]

I just joined the mail list yesterday. I have been reading the mail archive
but have not found exactly what I need. 

Can someone give me some instruction as how to build mod_webapp from the
souce file? How to build it? What to download? Once it is build, what do I
need to do to get Tomcat 4.0 to work with Apache 1.3.20?
I am on Windows 2000.

Thank you very very much.

Li