The free upgrade is sent out by the laptops manf. directly to you as
long as you bought the laptop in the past 4 months. It is regardless of
the current version of Windows Vista that you are running. According to
an article found here
"Acer says "shipments will begin in increments. All orders will be
handled on a first-in, first-out basis." So if you bought a computer
last week, you could be at the end of a long line."
Best you can do at the moment is just wait, your not going to be able to do much till Acer ships out that upgrade. Even if you did install Windows Vista Premium, you would be stuck till you got the Windows 7 from the manf.