All the default configuration options for Tomcat seem to be okay for this RPM, just make sure that the JAVA_HOME entry in the file /etc/tomcat4/conf/tomcat4.conf corresponds to your Java installation.
Please note that the default port that Tomcat listens on is not 8080 (as specified in all documentation files) but 8180. There seem to be a few problems with the RPM file, so it might be better to avoid RPMs on future installations. This option is configured in the /var/tomcat4/conf/server.xml file.