simple solution: start networking and set up ssh on your backtrack vm. get a copy of putty (available online, use your jedi search abilities). ensure sshd is running on your vm, and use putty in windoze to connect to your vm's ip address.
you can run putty as many times as you like to make as many connections to your vm as it will allow, in order to use the aircrack-ng suite. i.e.: run kismet in one window, airodump-ng in another and aircrack in a third.
why you would want to do it this way is beyond me, but that's one way to get done what you want to do.