I figured out the same solution which is already
mentioned, but I hacked the manual editing away :)
You have to download
sed (the binaries and the dependencies).
You only need the following files:
sed.exe from the binaries Zip file (remains in bin/) and the two DLL files from the bin/ directory in the dependencies Zip file.
Put the files in the Gothic directory (alternatively you could put them anywhere if the path is mentioned in your %PATH% variable or add paths to the following commands).
Now create a plain text file named start.bat (or start.cmd on XP and probably other NT or NT based systems) in your Gothic directory and copy the following text into it:
Code:
start /w sed -i -r -e s/^(zVidResFullscreenX=)[0-9]+$/11680/ -e s/^(zVidResFullscreenY=)[0-9]+$/11050/ -e s/^(zVidResFullscreenBPP=)[0-9]+$/132/ Gothic.ini
start Gothic.exe
Save it and change your shortcut to point to the start.bat instead of Gothic.exe.
The code above changes the resolution everytime you start Gothic. Change 1680 and 1050 (and 32) according to your needs, but
do not remove the 1s after the backslashes.