Remove SQL Server 2005

Today I got some error while installing Sql Server 2005. It told me some component aready existed because of previous failure installation. But the problem is I can not find anywhere to remove this component in "Add/Remove program".

That's How I have to do:
1. Stop all SQL Server services
2. Make sure that Microsoft SQL Server Setup Support Files appears in the list of installed programs. If not, goto 3, if yes goto 4
3. If Microsoft SQL Server Setup Support Files does not appear in the list, install this component before you continue. To install this component, follow these steps:

A. Locate the original SQL Server 2005 installation media.
B. To install the support files, double-click the Servers\setup\sqlsupport.msi file.

4. Run the command to uninstall the SQL Server components
At a command prompt, run the following command:
"%ProgramFiles%\Microsoft SQL Server\90\Setup Bootstrap\ARPWrapper.exe /Remove"

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