The search is ALMOST over.
Someone has gone ahead and put together a version of the soundtrack by mixing most of the tracks together to form one complete cohesive whole. It's not perfect since they left out a few of the shorter themes but a great start. I'm going to hopefully do some more research and hopefully in time we can finally get the complete thing.
For those interested head over tohttp://gkart.ucoz.com/load/2/
Like I said, not perfect (it's incomplete) but a great start. I'd love to see the whole thing become a reality one day.
As a sidebar: anyone have the GK Mysteries disc and could upload a lossless version? It's a shame that most of these things online are only 128kbs MP3 and it'd be great to have the officially mastered soundtrack in a HQ lossless format like FLAC.