The Arma2 tutorials pretty much apply just as well Boomotang.
As you have so much RAM available, try putting all PBO files over 100kb on to your RamDisk and then create symbolic links. Here's another RamDisk tutorial based on Arma 2/DayZ - http://www.22ndsas.info/forums/viewtopic.php?f=76&t=9205
The process of setting up a RamDisk is pretty much identical, you'll just be selecting different PBO files.