Download 
library Start Client with command java -jar
networkapp.jar
(Under Windows: Start => Run => execute cmd to open command shell, go
to download directory with cd
<directory>, type
<drive>: to go to correct drive). Start Server with command java -Xbootclasspath/p:networkapp.jar
be.ac.vub.tw.network.sessions.DedicatedServer
If necessary,
install the latest java (1.5 is required!).