Vic,
The Group Chat components are separate binaries as of the latest RC build. They are distributed in a separate folder and consist of three .exe files, one each for Server, Client and Admin. You also should have the R2 product documentation (.chm help file) which includes step-by-step instructions for deploying the server role. At the moment (latest build) it requires manual configuration of the SQL database and AD service accounts before running the ServerSetup binary.
You should get in contact with your TAP Buddy at Microsoft for any additional information.