TWG, the no DVD cracks are allowing you to play the game, just causing odd things like 1k skill points, waypoints not working, "error code 42".

Silver, I'm doubting a hardware issue. The game stops running when a .wmv movie has to play. TWG is able to play the movies in windows media player outside of the game. I'm betting on some sort of software incompatibility. Those two test programs I gave him are very good at detecting faulty hardware.

He has a NVIDIA GeForce 9800 GT (really good video card)
Check his first post for a link to the German thread. His dxdiag report is in there and in English.

Every time there I run into trouble on the road, there is always a dwarf at the bottom of it. Don't they know how to drive above ground?