I have Macbook Pro 2.4GHz Intel Core 2 Duo. I have Avid installed on my laptop. Now I want to install Final Cut Pro. I was told I would need to reformat the HD, then partition, then add Final Cut Pro, Leopard & Qt to one partition and Avid, Leopard OS & QT to other partition (as on my Mac Pro). Can I operate them both on the same system without doing this? My media would all be on external drives.