Due to our helpdesk cloning hard drives that already had ZCM installed on them, I need to give them some instructions to clear up the mess.

Is this the BEST/correct method to clear duplicate GUIDs:

1) On problem machine, run a: ziswin -c (to clear the ISD GUID info)
2) Delete the devicedata and deviceGuid files from the \conf folder on the windows machine
3) Open a CMD and do a:
zac reg -g

What rights are needed in the zone to do that? Just create/delete workstation rights?

Do i need to delete the existing workstation(s) in the ZCC first?