You are looking for to delete the cached password stored by CVSNT in the registry editor ??, This is your solution !!, this is a Registry Monitor designed for this, monitor a registry key and delete it after a configurable time.
A collection of Windows script files for system administration purposes, including waRmZip: delete/compress old files, waTimer: stopwatch program with statistics, waGetOpts: option parser for .cmd, waTee: copy STDIN to a file