Hi I dont know if it would work but could a Mackbook Air 256G be used like an ipod in the car I have an Aux input and an ipod dock usb . I am using an ipod 160G for my music(lossless) and an ipod touch for the good ladies music but its a bit of a faff to swop between them unles I used blu tooth but that meens the phone has to be disconnected thanks for any help*drinks*