Looking to get the CS3 upgrade and also an Intel Mac soon. I have CS2 as a download rather than an actual dvd/cd. They are compressed. So my question is this. When I buy the CS3 upgrade what does Adobe typically ask for when doing the upgrade? Do I have to have the previous version installed on that machine? I don't want to install CS2 on my new machine as I want to have a fresh install. Will a previous serial # work? Or will I have to unstuff the CS2 onto the new mac (without installing) and have the disc images on that machine?