Vista - Installing Vista Business OEM 64-bit over a Home Basic trial and create partition?

Hello,

So finally I have some extra time to backup everything in my old PC to an external HDD and move onto my new PC that I have bought a month ago.

It already has a Vista Home Basic trial installed but it has ended by now. It also has a couple of drivers already installed. However I have an OEM CD of Vista Business 64 that I'm going to use and I also want to have Vista to be in it's own partition. It's been a long time I had to format and create partitions so I don't remember much. And it was with XP then, not Vista.

I was planning to format the drive and then install Vista Business 64, but I've been told I can simply select an 'upgrade' option from Home Basic to Business and keep the rest as it is.

I also know you can create a partition in Vista, but can it be created in the drive where Vista is already installed? Like for example it's installed on a 640GB drive. Can I split it and have Vista be in a 80GB drive while the other 560GB are in a new completely empty partition?

Also, in case I format instead, should I do Quick Format or Format? I've been told the only thing normal format does is check for errors at the end. Since I still haven't used the new PC is Quick Format acceptable?

I'm planning on doing this tomorrow so the sooner someone could answer these the better!

Thanks!