Java/Tomcat Installation - Ubuntu Server

Project Description:
Hello,

I need to follow the following instructions for a installing a product called "Brekeke SIP Proxy":
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(1)Before installing Brekeke SIP Server, you need to install the following programs:

- Java J2SE JRE 1.4 or later (http://java.sun.com/j2se/)
- Servlet Engine Apache Tomcat 4.1.2 or later (http://jakarta.apache.org/tomcat/)

(2)Installing and starting
Copy the file proxy.war to webapps directory in Tomcat and start Tomcat.

(3) You now can access Brekeke SIP Server admintool through a web browser, for example, http://localhost:8080/proxy with the default user ID (sa) and password (sa).
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I downloaded the Java, Tomcat and proxy.war to the server (on which apache is already installed and running) and maybe even succeeded installing the Java (I'm not sure), but I'm not sure how to install Tomcat and if everything is OK. I need someone to check and complete the installation until step 3 above is confirmed and I can see the application running. Obviously, Tomcat and Java should autostart in case I reboot the server.

I also need help in preparing an init.d startup file for the following process:

<------------------------------
/var/stund/server -h 62.233.48.26 -a 62.233.48.27 -b
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For a knowledgeable Linux administrator, this project shouldn't take more than 1/2 an hour and the budget is consequently very low.

Thank you,

David