<p>In Visual Source Safe 6.0, you could "reset" a working folder by setting it to a blank string.  This meant that the working folder would be determined by the working folder of the parent.</p>

<p>How do I do this in Visual Source Safe 2005?</p>

This can't be done in the normal VSS 2005 "Set Working Folder" dialog.
However, if you
hold the shift key while invoking the "Set Working Folder" dialog
, it shows the old VSS 6.0 dialog.  Here you can reset the working folder by deleting the string and pressing OK.