How do I uninstall an instance of SQL Server 2005 from the command prompt
unattended?

The following command line brings up all instance names and asks to select
an instance and then a few button clicks. I want to eliminate the user
interactions
C:\Program Files\Microsoft SQL Server\90\Setup Bootstrap\ARPWrapper.exe"
/Remove

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