4way wiring in Austria: Run phase from junction box to 3way switch and travelers back up. Horizontal run of commons to junction box above 4way sw. 4 travelers down to 4way. 2 travelers continue to last switch and fixture wire goes up to the lamp. Neutral is usually run to the lamp from the nearest J-box available, through which the fixture wire passes.
Hope it's not too complicated, If I ever find my book again I'll mail a German schematic to Bill.
