Please note that HOWTO7925 was written a long time ago, for the Notification Server 6. It therefore does contain language and links that refer only to this version of the console.
Take a read of the "Configuring security" (Chapter 4) in the Symantec Management Platform 7.1 SP2 User Guide. It explains how to set up security and configure security roles
http://www.symantec.com/docs/DOC4730
As security is similar in both console versions, with both documents you should be able to work this through.
I'll raise that the howto needs a revision for the SMP 7.x world.
Kind Regards,
Ian./