how to replace certificate of Veritas Storage Foundation Messaging Service

Hello

I have a windows 2008 r2 based MS cluster with Veritas Storage Foundation for Windows 6.0.1 installed on the cluster nodes.
As a global requirement I have to update the self-signed certificate used by Veritas Storage Foundation Messaging Service (xprtld.exe) on port 5634, new cert should have a 2048 bit key.
How can I create a new certificate and replace the old one?