When restoring a backup, how do I disconnect all active connections? SQL Server

SQL Server Management Studio 2008

The interface has changed for SQL Server Management studio 2008, here are the steps 

1. Right-click the server in Object Explorer and select 'Activity Monitor'.
2. When this opens, expand the Processes group.
3. Now use the drop-down to filter the results by database name.
4. Kill off the server connections by selecting the right-click 'Kill Process' option.