Yeah, I disabled the stencil shadows and it was a little faster. I don´t know how much RAM my laptop has. I am not sure if it is because of the sound, because when I went back from B to A there was again some big lag. There wasn´t any guys talking. There wasn´t anyone, just me and that buddy (game start).
And a hint for the defines. It´s much easier to start a game with defines via a .bat file. Some time ago 3DGS automaticly created bat files but now you have to create them by yourself. I am using them in my latest game and it works wonderful.