Upgrading the Audit model from 8.3 to 8.4.1

[Anke]

Hi...we upgraded our Cognos from 8.3 to 8.4.1 last January.  We had previously installed the Audit model to run on 8.3.  I didn't upgrade the Audit model to 8.4.1 (for some reason I was thinking there was some new magical auditing tool available with 8.4.1).

I need to update our Audit model to 8.4.1.  Do I simple add the Audit model to the Cognos Configuration, then open the Model to upgrade (create new resource/namespace)?  Do I need to make any changes to the SQL logging db we created in 8.3?

I am paranoid that trying to update this Audit model is going to screw up the perfectly working 8.4.1 (we do not have a test environment). :-\

Thanks!
Anke