I know this answer is too late for you, Simon, but the "base" install for
the X64 client is disguised as a 5.1 MP4 pack:
Maintenance Pack NB_51_4_M.winnt.x64.exe provides fixes to the VERITAS
NetBackup (tm) Enterprise Server / Server 5.1 on Windows 2003 x64 clients.
http://seer.entsupport.symantec.com/docs/280950.htm
After that's installed, you can apply MP5 (or MP6 or MP7).
Thanks,
CRZ
--
Christopher Robin Zimmerman - <http://CRZ.net/>
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