> My question is simply can i use the *upgrade* edition of Vista Home
> Premium when my Windows 2000 professional license is also an upgrade.
> I only have the full edition of NT4.
>
> Cheers,
> Mike
>

Recording to Microsoft Denmark you can just install direct on a clean HD
with the Vista Update DVD. Some time along the installation your PC will aks
for a _FULL LICENSE_ cd/dvd, and when this check is over, it will continue
the Vista install. It is the same method used by WindowsXP Upgrade versions.
Don't install any earlier OS first, as it will only make your final
installation bigger. Correct me, if Microsoft Denmark and I are wrong here,
and I will get back to them, so they can look into it again.

Cheers
Sven