For the good news, I did the first test with the 64 bit version of vArranger.
I have tested to load 5GB of SF2 samples + some 64 Bit VST instruments, and all seems to work ok !!
64 bit is awesome news, and a must in the current PC computer world... all top VSTs you want to run in 64 bit..
Keep it up man, this is another great step to proffesionalising your product