Did you already buy the soundtrack? Let me think about, I had originally planned this for just a Soundtrack and hadn't considered this.
Viewing post in Santa's Silent Night Soundtrack comments
I've sent an email, should give you access to a new project I've set up for licensed versions of the music. It should give you a free copy. The project contains MP3 and WAV formats of the songs. Download these ones and use them for your Christmas game, a credit would be nice but not required. If there are any issues email me back.