We describe the most recent step in the evolution of SIDE/SMURPH and, specifically, a generic model of a wireless channel, which enables to use the package for accurately modeling wireless networks, especially ad-hoc networks consisting of a potentially large number of possibly mobile nodes. The generic nature of the channel model allows the user to introduce functions describing the propagation characteristics of the actual wireless medium, e.g., the impact of distance on signal level and interference, as well as the relationship between the signal-to-interference ratio and the probability of a successful packet reception. To illustrate the capabilities of the supported extensions, we review an example of a shadowing channel model.