Vista and OEM and multiboot

I have a packard bell with Windows Xp mediacenter edition OEM pre-installed.
Works fine. I am waiting Windows Vista - with express upgrade for vista
capable computers- .
I would like to have a multiboot computer to see if Vista is able to do all
what i need and to wait the total replacement..
* What I don't know is if I can do a multiboot with an OEM and the express
upgrade license. I can?
* The xp key still works after Vista insatallationa and verification of the
Key?

Thanks
Marco, Italy

No one knows?
Thanks
Marco

"Marcoo" wrote:

> I have a packard bell with Windows Xp mediacenter edition OEM pre-installed.
> Works fine. I am waiting Windows Vista - with express upgrade for vista
> capable computers- .
> I would like to have a multiboot computer to see if Vista is able to do all
> what i need and to wait the total replacement..
> * What I don't know is if I can do a multiboot with an OEM and the express
> upgrade license. I can?
> * The xp key still works after Vista insatallationa and verification of the
> Key?
>
> Thanks
> Marco, Italy
>
>
>