Upgrade symantec netbackup from 7.0.1 to 7.5 on unix

Hi,

I am going to upgrade symantec netbackup 7.0.1 to version 7.5 "or to the last version" .

Kindly i need your help to do the upgrade ,your recommendations ,and the documentations that help also the best way to do that ...  thanks.

master server data:

Symantic Product Name: Symantec Netbackup

Product Version: 7.0.1

Operating System: HP-UX 11iv3