Upgrading from Home to Pro

[blastoboy1000]

Hi

I've been thinking about upgrading my XP Home Edition to the Pro Edition, but I have one question (and this will apply to Longhorn too when it comes out):

Is a re-format of the Windows Drive necessary for upgrading?

Thanks in advance.

[genesis]

home to pro upgrade should be very easy, no formatting will be required but I'm not sure about longhorn, too early to say.

[blastoboy1000]

Excellent. Thanks.