I need to assign my ten BPT licenses to one project only as well as within that one project, restrict them to only certain users. How do I best accomplish that?

We are currently in the process of upgrade ALM to version 12.53. During the upgrade we are changing the name of existing Domains and projects to more align with current business process. Is there away to do a mass update to give existing users access to the new domains and projects? (e.g. current us...