Installing The first SBA service is actually quite easy. It's on the CD. Run the main install, and be sure to select both SBA and Web Client Runtime.
Choosing to add SBA to the install will add this window to the install. Add the domain account that will run the SBA Service
After the install completes, you'll see the GP Dexterity Service running in the Services applet
After installing Dynamics, run Utilities and select Manage Web Client SQL Server login. This is a short utility that just sets the username/password used by the Web Client. This needs to be a dedicated SQL Server login with rights to the company and system databases, and in the DYNGRP role