Vista - How to re-install Ultimate without the full or upgrade disk?Microsoft Ultimate Upgrade Digital Locker issue?

I have a PC which originally in 2006 had XP, then I used Vista
Business Upgrade disk and License to upgarde to Vista Business last
year. Worked fine. Then I spent $139 around xmas with Microsoft's
online Ultimate Upgrade and they sent me the Full all-versions DVD and
an email with some Digital Locker code. Windows Ultimate Vista is now
perfectly installed.

So, Now I want to scrap that old PC and put the Ultimate license on a
new PC I have which has no operating system on it currently.

1. I understand I can transfer the license to the new PC by
uninstalling Vista and formatting the older PC's hard disk, but...

2. I am not sure how to proceed because I do NOT have a Ultimate
upgrade disk, just the all-version Vista disk. For that matter I am
not even sure where my Ultimate license is since Microsoft sent it to
me in some kind of Digital Locker token. I have the Vista Business
Upgrade disk and license there too. And I have the original XP disk
and license.

I would like to just re-install whatever to get to a Ultimate Vista
machine using my existing license(s).

Suggestions on a path to take would be helpful.