Activity Monitor in SQL Server 2008

Hello All,
I have to know about how to kill a process in SQL Server 2008.
While restoring a database in SQL, if that database is using an another user, then i had to kill that user using Activity Monitor(under managemnt) in SQL Server 2005. But when i a Changed to SQL Server 2008 i cant do that. I have found Activity monitor, but it wont showing the database name to kill.
So please help me....

You can run this query, and it will show you all running processes:
sp_who2 active
Find the value in the SPID column for that particular process, and kill it with this:
kill 1234
(where 1234 is the SPID value)