Unattended Uninstall of an an Instance

I have found an article with the following command but it brings up all
instance names. Is there a way to provide an instance name to this command
line?

"C:\Program Files\Microsoft SQL Server\90\Setup Bootstrap\ARPWrapper.exe"
/Remove

"Rick" wrote:

> How do I uninstall an instance of SQL Server 2005 from the command prompt
> unattended?
> The following command line give me the error "Microsoft SQL Server 2005
> Setup was unable to install on your computer."
>
> "C:\Program Files\Microsoft SQL Server\90\Setup Bootstrap\Setup.exe"
> /Action=Uninstall /FEATURES=SQL /INSTANCENAME=MyInstance