Oof, I missed this thread at the time. To change CDs in the GOG version:
- Open the game.
- Using a text editor, open CD.DAT
- Change the number to the CD you want the game to think you're using (default is 1)
- Save CD.DAT and start the game again.
When you say "open the game", did you mean the game folder? Or do you mean starting the game and editing CD.DAT while ingame?
EDIT: I found out that if you've applied the DOS to Windows patch to the game, you can just run "darkfix_setup.exe" from the game folder and easily change the game CD from there.
