dublinbox is a standalone application that is used to show an example of the sampling/midi/vst posibilities with mxdublin. This application comes bundled with Max/MSP.
This software is released under the LGPL.
You will need to put mxdublin.jar in your pdj/mxj system-classpath. This is done by updating the file pdj.properties on pure-data or max.java.config.txt on max. It's very important to put this .jar in the system-classpath since jython won't be able to see user objects. Be sure to put all the other .jars that comes with mxdublin.jar in the same path.