I believe it was "Ken Blake, MVP" <kblake@this.is.an.invalid.domain>, who
said in message news:uFN5GSCDHHA.3620@TK2MSFTNGP02.phx.gbl...

>> If they are the same versions of XP eg XP Home OEM, then it should
>> work fine,
>
>
> No, it requires more than that they match with respect to Home vs.
> Professional. They also have to match with respect to Retail vs. OEM, and
> Full vs. Upgrade.
>

The word 'OEM' was included in my reply.

--
Jon