Go to a computer with an internet connection, go to
http://rpm.pbone.net , "go advanced", Make sure "Fedora 6" is the only box selected, and search tomcat. Then download the tomcat package.
Take the rpm back to your computer, and install it with " rpm -Uvh tomcat<xyz>.rpm " . You'll probably get a dependency error listing all the packages you're missing, e.g.
"libgnomeui.so.1 required by package ..."
Seach for "xyz.so.z" or whatever again at rpm.pbone.net as before, download the package, install it, if there are any dependency errors, repeat...