The BEC is not operational AFAIK while on USB. Power is taken from the USB port regardless, hence why CC states to disconnect batteries before connecting the a Castle Link adapter to any ESC. VMWare has is progressively becoming more and more bloated, I remember when the download was just 50MB. I use VirtualBox from Sun on my Ubuntu powered laptop and it works fine on both my MM and MMM. There's a windows build too, all the downloads are here
http://www.virtualbox.org/wiki/Downloads
E-Revo - Mega ACn 22/45/1E MMM 6S
E-Maxx - Feigao 7XL MM 4S
AX10 RTR - Stock :D
Micro-T - Losi LiPo upgrade
Mini LST2 - Discarded. Useless POS.
1/8 Scale Baja Bug - Medusa 36-50-3300 eZrun 60A 3S