.Root in Source Safe

Frustating everytime I created a project the postfix ".root" is added. Finally I have found a site with the same problem (or an the MSDN website and a SOLUTION.

You are running into a feature referred to as 'Solution Root' added 
to VS2003 (and carried forward into VS2005).  You can disable this behavior 
via the following registry entry:

HKEY_CURRENT_USER\Software\Microsoft\VisualStudio\8.0\SourceControl\DoNotCreateSolutionRootFolderInSourceControl