I just did a bit of detective work to find the answer to this question.
As far as I can tell, queues are saved in
\Users\[your-user-name]\AppData\Local\My Games\Beyond the Sword\Profiles\Default Profile.pfl
Unfortunately, it's not a plain-text file, and the file is loaded from inside the game exe itself (not from the dll), so I can't tell you the format of the file.