self-signed certificate for NBAC

Hello, I am looking for a process to change the way NBAC uses certificates on the root broker. What I am looking to do is import a certificate into the root broker instead of using the one that is provided in the base install and setup.

I am currently running NBU 7.5.0.5 on a Windows 2008 R2 server. Our policy required SSL certs to be issued to the appilcation and not self generated with a high level of security.

Any help on this would be great.

Thanks

John C.