Uploaded this as a CustomOST mod version a while back. I can no longer use that mod cause it crashes my game now for some reason. so I made a BeardLib/SuperBLT version.
CustomOST version: https://modworkshop.net/mod/38379
Installation: Just extract the folder into mod_overrides
Stealth: MC 5.5 Theme
Control: MC 6 Train Madness
Buildup: MC 7 Theme
Assault: MC 4 Theme