Hmm, I tried, but things did not change.
I'm really grateful for trying to help me. I'm sorry to say that I can't get it to work though, even with the installer. There is some sort of error when trying to install the driver, whether or not through your installer or the driver you linked. The game starts and runs just as described earlier. I've tried fixing the DirectX drivers through winetricks as well but that did not seem to do a difference...