I tried adding it to the shortcut properties on the desktop, similar to how it's done in Heroes 3: "C:SoDhomm3.exe" /nwcgrail - but it doesn't work. Removing the space or putting the code inside quotes doesn't save the changes. How do I enter it correctly?
to use it, you need to switch to windowed mode, and also something appears in the System Menu and Game Menu on the right panel.