Problem in uninstalling SQL Server 2000 Cluster

Dear all,

I have installed SQL Server 2000 default instance cluster in two node windows 2000
advanced server.

As part of testing activity, unfortunately i removed windows cluster without
uninstalling sql server 2000 cluster instance.

Now when i run sql server 2000 setup, after entering virtual server name, under
installation selection 'Upgrade, remove, or add components to an existing instance of
SQL Server' option is disabled.
In fact the setup always tries to create a new cluster after entering virtual server
name.

What might be the problem?

Is there any way I can remove existing clustered instance.

Help is needed.

Thanx in anticipation
Senthil Ps.