Music by Neppu Tennouboshi

This mod implements "Rainbowmaker - Sweet Dreams" into the game as a standalone music soundtrack, SuperBLT is required for this.
Check the song here : 
https://soundcloud.com/rainbowmaker_heart/sweet-dreams-v2
The stealth, control and anticipation parts (as well as the assault for the old version) are from the old version, which you can find here :
https://soundcloud.com/rainbowmaker_heart/sweet-dreams

He makes good stuff you should check his other musics.