Hi CapCon,
If you are an user of the FS2004 and you are interested on the german ATC, just have a look at
www.vatsim.net and especially at the german part:
www.vacc-sag.org
All you need is the Flightsimulator (Version 2002 or later) and a working headset on your pc.
Just sign up VATSIM for free and download the connection software, named Squawkbox or FSInn.
There you`ll find the same rules in virtually flying than in the real world and you can virtuall visit your destinations and look, how the ATC works.
You will be fascinated, how realistic and professional the virtuall ATC works.
For further questions, you can mail me:
[email protected] or just look out for the Deputy Chief of the vBerlin FIR at VATSIM