Barracuda is built using Ant 1.5.1+. Here's how to install the Barracuda 2.x binaries...
To actually install the project, open a command console, cd to Barracuda/WEB-INF/bin, and type "ant" to run the default build target (currently the "install" target). Or, if you are a windows type, you can simply double click WEB-INF/bin/ant_0_install.bat.
Running the install task will copy some sample configuration files into place. You can edit these files later if needed.
Once you have run install, simply configure Tomcat to register the /Barracuda url to your Barracuda installation root. Cycle tomcat, and you should be good to go (try http://localhost:8080/Barracuda to test it out).