Too bad they didn't include Caramel Mix, Usagi or the other forgotten songs from the DVDs.
Don't forget there will be also a new dvd, so they could be included there
I believe the unreleased Silent Hill 2 track, "KO," is from something called The Robbie Discs, or somethingâ€”a four-song disc of super-techno, almost-remixes.
I think you are talking about the Robbie Tracks CD, but they were from silent hill 4 (I had never heard something like KO before, not even from the CSTs)
"Your Rain (reprise)" is undoubtedly the remixed version of the song in-game, beneath Joseph's speech from the ceiling.
I haven't played SH4 in a long time, but If I remember correctly, the song played during that scene was Tender Sugar.