Windows Vista 32bit to Windows 8 64bit

I plan on getting Windows 8 64bit upon its release. However, I am confused as to what license I will require.

I currently have a HP laptop (pavilion dv6760ea) running Windows Vista 32bit.

I will be upgrading the laptop HDD to a SSD and also (hopefully) upgrading to Windows 8 64bit.

My plan is to do the following:

install the new SSD,
re-install Windows Vista 32bit (also have a question regarding this too, see below*),
upgrade from Vista 32bit to Windows 8 64bit (via custom installation).

All my data will already be backed up due to the drive swap, so losing any data is not a problem, all I need to know is that it is possible to upgrade using an Upgrade license of Windows 8 64bit.

Or, will I need a full OEM license of Windows 8 and start from scratch?



* Question regarding re-installing Windows vista;

As the laptop originally came with a 250GB HDD with a HP custom install of Windows Vista, and I will be fitting a 128GB SSD, I don't think I can use the original recovery disc as it will not be able to use the same drive partition settings (something like 9gb for recovery).

Can I instead use a plain standard (legal) copy of the Vista installation disc and use the Windows license key from the bottom of the laptop? Or will this flag as an invalid license key when validating Windows?



Thanks in advance for your replies, if any further information is required I'd be happy to try and provide that.

Andy.