hi, i have a widescreen monitor and thus the screen is a little bit streched. i saw that gog included a display tool in the install folder. but im not sure how to make it work. can someone help me out how to make it not streched? i.e. with bars on the side

2 possibilites in general:

1. Any modern computer screen should have a feature to keep the original aspect ratio. Check the menus or your screen's manual for that.
2. Usually you can force the same setting in your GPU driver control. Here is a rough translation of my German (and latest) Nvidia control panel settings. DIsplay ---> Desktop size and position ---> Scaling ---> Aspect Ratio. Also select "GPU" at "Apply/Force scaling with". If you use an AMD/ATI GPU I have no idea right now. Maybe some other member can help you there.

awesome guys, thanks for the help! to me the easiest way was to fiddle around with the monitor settings :D

You're welcome. =)