Cossacks: Back to war CD protection

[llewelyn]

Anyone know what protection the "back to war" CD uses?

I've successfully produced image files to mount on virtual drives for the first 2 CDs (European Wars and The Art of War) which allow me to run the games without continually swapping CDs, but I've not succeeded in running "Back to war". I can mount the image file, and install from it, but not run the game without the original CD in the drive.

What does the "NO-CD" exceutable archive on GCW do, or looking at it another way, how is it installed? doesn't seem to do anything here, but I'm probably not installing it right :-)