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I downloaded ROTH game plus, plus manual. I installed ROTH by clicking on setup realms of the haunting.exe file I downloaded to I am using Win XP and have played many games including a few from Gog. but have never dowenloaded a game and never a separate file either. Where does the file go to get unzipped? Does it get unzipped in the same folder as Programs/Gog//Realms of the Haunting and unzipped there? What exe file do I click on to start the game? Thanks for any help.
This question / problem has been solved by Namurimage
The file contains the musics used in the game, they are meant for listening on your music player just like any other soundtrack, so they're an extra, like avatars or Artworks and not something required to run the game.

If you have already installed the game you start it by double clicking the shortcut that should have appeared on your desktop, or you can launch it from the game start menu folder

Start >All Programs>>Realms of the Haunting>Realms of the Haunting (icon)
To unzip the soundtrack, you will need some sort of unzip program. I recommend IZArc:

Then, you just tell IZArc where you want the unzipped sound files to go so you can listen to them wherever.

If you went through the setup install, then you should have an icon on your desktop and a link in your start menu to start up the game.