There's a patch for Black Dahlia, be sure to use it.
This is what it helps with:
1. Unsupported RGB Mode error.
2. Random crashes (associated with setting music
volume to zero).
3. Rune (gem) puzzle bug. Note: type the word 'RESET'while in the puzzle interface if the puzzle is currently 'broken'.
4. Trouble with people not returning objects to you.
5. Load file error when restoring game (after CD 6).
6. Full subtitle support. To enable, edit the BD.INI in the directory where you installed the game. In the [options] section, edit the line: 'subtitles = 0' to read 'subtitles = 1'.
Before you begin this game, I strongly suggest you utilize a slowdown
Watching: Dark Shadows
Reading: Angelique's Descent
Playing: WoW and living in Kil' Jaeden