The soundtracks are, as Kein wrote, by Kirill Pokrovsky. He has made all the music for the Divine Divinity games-- that's how I found out about him. I love his music.
Mr. Pokrovsky has his own website, and you can download the music for free from his site. I think you can only download so much a day (a work around is deleting 'cookies' and waiting a couple of minutes). Kirill has his own 'album' called "Top of the Mountain" which is wonderful to listen to, and I personally prefer it over his Bruggae.
Anyway, for those interested his site is located here: Kirill Pokrovsky's Personal Website
You all have a great day/night (depending on your time zone).