I have the same problem.
I have VMware 6.5 with BT4. and then I type in airmon -ng I am inform that BT can't finded any Nics. I have tryed BT3 with in VMWare then works fine. and I am going to try Win XP to make sure that it is not a driver problem.
if they is a way to find out a way to install the drivers or to start then I would be interested



