Buttkicker 2 with USB Headphones

[Bullit]

Can anyone help me with setting up my Buttkicker 2 with USB Headphones, normally this is not possible however there is a programme called Virtual Audio Cable that can also be used to send the sub frquency to the mother board sound card jack (line out) for the Buttkicker 2. if anyone who uses one of these has got it figured out and can help it would be most appreciated, thank you in advance.