I am going to purchase a Lacie D2 external hardrive and I was wondering can I have it hooked up to me powerbook with firewire 400 and hooked up to me PC with USB at the same time? If so could I have both machines on and both see the drive, so I could quickly move files back and forth? I would like to use it as a central file location and for transferring date between the two machines. Before I get hammered I am an engineering student and I need the PC for solidworks and ProE etc.