Install Vista "upgrade" as a "full version"
Got this from another forum:
"I remember installing XP Home upgrade as a full version for a friend by just throwing in an old Win98 disk during installation. Well here is a article that shows how to do the same thing with Vista without any other disks at all. Hope this might save somebody a few bucks.
Windows Vista, in my opinion, is a big improvement over Windows XP in many ways. But the new operating system is distinctly overpriced.
The list price of the "full" (not "upgrade") version of the most expensive edition, Vista Ultimate, is $399.95 USD, with a street price around $380. That gold-plated retail figure is only possible because Microsoft long ago achieved monopoly pricing power in the PC operating system market.
Most computer users would prefer to keep using an older version of Windows, such as XP, rather than paying the inflated prices for the "full" version of Vista. To encourage switching to a new OS, Microsoft has historically offered a lower, "upgrade" price to people who can prove that they've previously purchased an older copy of Windows.
The difference between Vista's full and upgrade prices can be substantial. Based on the asking prices shown at Shopping.com on Jan. 31