Q. Why cant BackTrack use wireless card “X” inside VMWare or Virtualbox ?
A. Any virtualisation software can only use USB wireless network cards as physical devices, all other types of wireless card are seen as virtual ethernet devices and can only be seen as a wireless device by the host and not by the guest operating system. So if you want to run BackTrack in VMWare or Virtualbox and have full wireless capabilities, make sure you are using a USB device.