dpsa \R2\ contains:
R2\ -Realtek HD Audio
  DriverVer 06/16/2009, 5.10.0.5874 (2.27) 
    Versions 2.28 thru 2.44 cause install problems reported here: 
  http://forum.driverpacks.net/viewtopic.php?pid=36148#p36148
  http://forum.driverpacks.net/viewtopic.php?id=4294
  
These drivers in R2 MUST REMAIN INTACT and unaltered.
Newer Realtek HD Audio drivers will go in dpsa \R\ but will have some .inf files edited so to break driver signing intentionally.