To install sql 2005 64bit, do I need to un-install sql 2005 express first or would it automatically upgrade?

Hi, I'm running windows 7 Enterprise.  The current sql express version information is as below.  I'm not sure if it's 64 bit or not.  
Microsoft SQL Server Management Studio                                    9.00.5000.00
Microsoft Analysis Services Client Tools                                    2005.090.5000.00
Microsoft Data Access Components (MDAC)                                    6.1.7600.16385 (win7_rtm.090713-1255)
Microsoft MSXML                                    3.0 5.0 6.0
Microsoft Internet Explorer                                    8.0.7600.16385
Microsoft .NET Framework                                    2.0.50727.4952
Operating System                                    6.1.7600

Microsoft SQL Server 2005 - 9.00.3042.00 (Intel X86)   Feb  9 2007 22:47:07   Copyright (c) 1988-2005 Microsoft Corporation  Express Edition on Windows NT 6.1 (Build 7600: )