Installing Apache Tomcat on Dreamhost PS

Does anyone know how to install Apache Tomcat on Dreamhost PS? Or perhaps a good tutorial of how to do it?

So far I have only been able to find this guide: But it is too imprecise or assumes too much knowledge for me. It says that Dreamhost PS uses a version of Linux that is not compatible with newer versions of Apache Tomcat and so requires an upgrade of the Linux version.