Simulation is one of the most important techniques for analysis and improvement of technical systems. The reduction to the most important characteristics minimizes the complexity and points out the fundamental attributes. Especially in the area of the communication networks, the simulation is an indespensable method. In the last few years the Peer-to-Peer (P2P) network protocols play an important role in the network analysis and simulation. Among them, eMule/eDonkey is one of the most important representatives in Europe and hence is an interesting target for investigation. The author Bjorn...