How to: Install Analysis Services Side-by-Side with an Earlier Version
You can install SQL Server 2008 Analysis Services side-by-side with an existing instance of SQL Server 2005 Analysis Services or of SQL Server 2000 Analysis Services.
When you do a side-by-side installation with SQL Server 2000 Analysis Services, you must install SQL Server 2008 Analysis Services as a named instance because SQL Server 2000 Analysis Services does not support named instances. If you later remove the default instance of SQL Server 2000 Analysis Services, you can make an instance of SQL Server 2008 Analysis Services the default instance by using the Analysis Services Instance Rename tool. For more information, see Rename an Instance of Analysis Services.
When you do a side-by-side installation with SQL Server 2005 Analysis Services, you must install SQL Server 2008 Analysis Services as a uniquely named instance
Important
The Analysis Services installation how-to topics in this section focus only on installation options that are specific to Analysis Services. However, these topics provide links to other topics for more information about installation of SQL Server.
To Install Analysis Services Side-by-Side with an Earlier Version
Run Setup either by using the SQL Server Installation Wizard or at the command prompt. For more information, see Considerations for Installing Analysis Services.
When you use the SQL Server Installation Wizard, specify a unique instance name on the Instance Name page. When you run Setup at the command prompt, specify a unique instance name by using the INSTANCE option.