Off-hand...does BE 2010 support Itanium servers?
If you look at the Admin guide, I have provided the link below, It doesn't appear that it is supported.
If this response answers your concern, please mark it as a "solution"
If it had support, it would have made life a hell of a lot easier...NetBackup is apparently so expensive its funny. Oh well, time to ask for another quote on that one!
Alternative ways to access Backup Exec Technical Support: