Upgrading to Tomcat 4.0 on SuSE 7.3

Does anyone have experience upgrading Tomcat on SuSE 7.3 Pro from 3.2.3 to the latest version 4.0 and have SuSEconfig start Tomcat 4.0 rather than 3.2.3? I have change the TomCat Home, but can not get this to work. Any help would be greatly appreciated. Ivan