Titan Quest - Winzip issue

I've been playing Titan Quest a lot lately, and have fallen in love with much of the background music. So I went to the Titan Quest folder to see if the music was stored as MP3 or other kind of music file. But all the music is apparently stored in a winzip file, that will not open or be unzipped.
Is there any way of unzipping the music files?

 

Most newer games use some strange way of jhiding their music and i my self have wanted to get the music off of a few of my games. Sometimes you can just search through and find the .mp3 files but seeing as its new, it qwont be that easy. Ive seen a few programs that will let you take music out of your game folders so google around for one. Also (this can sometimes take a long time, depending on hoe much music you haveon your hard drive) but just run a search for .mp3 in all files, it can sometimes turn up interesting sound files from different programs.