Since toolbars and other interface objects are now controlled by Workspaces, you will want to create custom Workspaces and then force those to apply on startup.
You can force a specific profile and Workspace to load on startup by adding Switches to the MEP icon. The technical solution below, has instructions to do this. You'll want to use the /w and /p switches.
Startup switches (http://usa.autodesk.com/getdoc/id=TS22957)
Please let me know if this does not resolve your issue or if you need further assistance with your Support Request.