in the forums I've found a lot of articles concerning
the GUID problem (same GUID on reimaged devices).
All these articles describe solutions assuming that the
zen agent is installed.
But I'm interested in the generation of a new GUID
without zen agent is installed on a device.

Now my question: Is it possible to control the generation
of the GUID of a client (blank WindowsXP without any software)
*before* the zen agent is deployed?

What are the criteria of the generation of a GUID
(I've checked that SID or IP or hostname have no influence)?

Thanks and best regards