nbuclient 7.6.0.1 client local installation & RPM

Hello there!!

Let me introduce myself first, I am Javier and have been for some months playing around with NetBackup in our company.

I came accross the following problem:
 

• We have a pretty big environment, let's say >1K client machines with NBU7.1.X / 7.5.X
• We have successfully upgraded our master servers and media servers with NBU7.6.0.3 last weeks.
• What we plan to do now, is to upgrade our client machines to this last NBU version (7.6.0.3), but we wanted to do it locally in each client. 
  So we created an RPM package, with the 7601 version and other with the patch 7603, to deploy it from our UNIX Network Satellite.
  The problem arises when we noticed that the ./install script calls RPM to remove the old installation's Agents and Packages working on the very same client and, as it's well known, there is no way to call RPM inside RPM (due to RPM DB locks and so on).

The question is:

Is there is any other way (such as copying the nbuclient BINARIES directly, ... etc) for installing nbu7601 (obviously with new agents working properly, etc) and then upgrading to nbu7603?

why do we want to do it this way? We want to deploy it automatically on thousands of servers and, therefore, avoid overloading masterserver's network traffic, consolidating it in the shortest time possible.

Thank you in advance!!