The reason for the (tn) image was simply to show 2 disks were included with the Vista (Bill Gates Signature Edition) package.
Want a larger image, you can DL the image then expand or
view here:
www.dhcnetwork.com/~s0121/BillGates/42.JPG

Notice the Disk do state "UPGRADE", $259.99 - and the info I post on how to comes from the manual included. There also was simular info on how to UPGRADE-clean install from a UPGRADE Disk of XP. Different for sure. but the info was included,
I'm sure there are some older XP Beta testers like me that remember How to.
Im sure some older Beta testers, remember also how to downgrade with XP, using the slipstream method to make upgrade 0r downgrade