[EDIT] @ rishi: If you use audacity why dont you amplify them a bit (till 6,5 for example) it helps hearing the music clearer. (make sure you click the 'allow clipping box")
I did it to track 13 of Toki Den folder, and then I "normalised" the parts with the sound effect so that they are less loud, the result is this ?3zox1v2d32c1kzt (mediafire)
I think I heard one track that is very similar to Satoyama Sekai's 'the land of water'.... (can't remember the track number..Orz...I'm at office now and can't listen to any songs here.) Which show released first..? HKK or Satoyama's doc.?
Hokuto no Ken was first, but the first one, these 2 osts that rishi recorded were afterwards (around 2008-2010) but not all of them are totally new tracks, some are rearrangement from OST I http://canta-per-me.net/discography/2007-2008/ (bottom)
i heard this song in Shin Kyuseishu Densetsu Hokuto no Ken Raoh Den - Gekito no Sho ...which is too similar to sekai satoyama kikou ost-land of the water
and find out around 13 new rearrangement tracks of SHNK