You may have installed WSS 2.0 using the default configuration only to find out later that to use this for TFS 2005, you need to install it using Server Farm mode.
When you use the Add or Remove Programs control panel to remove Windows SharePoint Services from a server, it calls a command-line operation, stsadm -o uninstall, to perform the task.
The uninstall operation does not remove any chained products that were installed. The uninstall operation
takes the optional -deletecontent parameter. When uninstall is used without the -deletecontent parameter, it leaves the content and configuration databases in place, so that Windows SharePoint Services can be reinstalled, and you can reconnect to the databases and continue hosting sites.
When the -deletecontent parameter is used, the content and configuration databases are removed, and you cannot recover the site content.
Go to stsadm.exe utility located at the following path: %drive%program filescommon filesmicrosoft sharedweb server extensions60bin
For command line parameters go to – http://office.microsoft.com/en-us/winsharepointadmin/HA011608431033.aspx
From Add/Remove Programs, don’t forget to uninstall Microsoft SQL Desktop Engine (Sharepoint).