Forcing resolution on Steam version?

[Yuhaney]

Go to main folder of Black Plague (where ever you installed your game).
Open up a file called 'settings' (it's CFG File) by double clicking on it. (If it asks where to open, just use WordPad or something similar!)

Search the following line from the file:
<Screen Width="xxxx" Height="xxxx"

Replace the X's (it's numbers in the file) with the resolution you want and save the file.

Start the game and you should have the resolution you want.