Ghosting OEM HP Vista machines problems

We bought 200 computers(HP Workstation XW4400 with Windows Buisnes OEM)
to our computer lab.
For first 8 weeks we was running Windows 2000 pro (so called
downgrading) on all computers, because I did knew how to ghost and roll
out it. No activations and such things. Just make ghost, ghost all
computers and run ghostwalk on all of them.

How I can ghost OEM Vista to all of the computers. Can I install one
machine with original OEM Vista and ghost it the same way Windows 2000 I
done. Then rollout and run ghost walk. What with activation. As I know
HP is using master registration key, and all machine are the same.
Will ghosting work this way????
Need help ASAP


Regards
Marcus