Move TempDB from one drive to another drive

Run this script to get the names of the files used for TempDB.
USE TempDB
Go
EXEC sp_helpfile
GO
Move the files to another drive
USE master
Go
ALTER DATABASE TempDB MODIFY FILE
(NAME = tempdev, FILENAME = 'd:datatempdb.mdf')
Go
ALTER DATABASE TempDB MODIFY FILE
(NAME = templog, FILENAME = 'e:datatemplog.ldf')
Go
Change the default size
USE [master]
GO
ALTER DATABASE [tempdb] MODIFY FILE ( NAME = N'tempdev', SIZE = 1024000KB )
USE [master]
GO
ALTER DATABASE [tempdb] MODIFY FILE ( NAME = N'templog', SIZE = 512000KB )
GO

Add file to TempDB filegroup (with Autogrow OFF)

USE [master]
GO
ALTER DATABASE [tempdb] ADD FILE ( NAME = N'tempdev2', FILENAME = N'D:\Data\tempdev2.ndf' , SIZE = 10240KB , FILEGROWTH = 0)
GO