Sacred Haven of Debauchery

You take the contents of the archive and put them in the game folder (not necessarily, but it's easier that way). You launch the console or, better yet, a file manager, and in it, you launch the executable file. For example, you type zip2orc.exe Data5.orc, and then you wait for a while, and a file called Data5.orc.zip will appear in the folder, which can be opened with WinRAR. I don't remember which specific .orc file contains the music, but I wrote about it in the thread about music in Heroes 6.