Help on Uninstalling SQL 2005

[napstar]

I installed SQL 2005 and uninstalled using Add/Remove Programs.I tried re-installing again but it displays the follwoing Message:

None of the selected features can be installed or Upgraded.Setup cannont proceed since no effective change is been made to the machine.To continue click back and then select features to install.To exit SQL Server setup click cancel.

I also noticed that the pervoius instance of SQL Server is still on the machine.How doI get this off?

[Motoma]

I would suggest posting this as a bug to one of the Microsoft tech support thingies.