The game is so old that I don't really remember.

But what this is, is just a backup to "direct-play" the game, I lost/damaged/misplaced the original or whatever a LONG, LONG time back.

So, if I ever want to play the game again, I just copy the game files into the hard disk and play directly. The same I do with Heretic/Doom/Wolf3D, etc. for which I dont have the original CDs/floppies anymore.