I want to install windows vista and be able to run on my external drive to use on my MacBook pro. (I would like to avoid partitioning the internal drive.) Can anyone help me with clear step by step instructions, or suggested programs to use? I have a Gtechnology external drive (USB/FireWire) and 17" MacBook pro. I have scanned so many posts and tried several "tips," but have been unsuccessful thus far. Thank you to anyone who can assist!