Hey juergen, maybe it helps that you connected your dvd drive to a raid controller (I did it on another computer and it helped a lot with a lot of games). However, just to say that I've tryed 5 ou 6 different ways to get the version 1.15 running without the DVD and they all failed (not nice!).
The only thing left is the 1.15 fixed exe/no dvd exe talked about by cosmiq... I can't find it so I guess things will have to wait before I get of the dvd!
Vortaka
P.S. Like they say, patience is a virtue!