Hi Leon,
I checked the configuration of HP 8000 Elite model which is having AHCI controller (ICH10 family). I suspect that machine task hung in pre-os (winpe), this is AHCI controller issue which we recently fixed in build 2269 (after RTM build). Just to check the problem (workaround), put the blank cd in cd rom and run the rename and domain tasks mentioned above in your thread, it should work.
Please contact Symantec tech support to get this patch.
For other problem, try the solution Yogesh suggested.
Regards,
Nitin