1 /INPUT
/INPUT=file-name Specifies a name of the file to import. The default input file name is REGISTRY.TXT.
2 /LOG
Displays the import progress to the screen.
3 /WAIT
/WAIT=seconds (default = 90) /NOWAIT Specifies the maximum amount of time, in seconds, that you are willing to wait for command completion. If the Registry server does not complete the request in the specified interval, REG$CP returns REG-F-NORESPONSE. The default interval is 90 seconds. /NOWAIT is equivalent to specifying /WAIT=0, but there may still be a short wait period.
4 /WRITEBEHIND
/WRITEBEHIND /NOWRITEBEHIND (default) Specifies when the information can be written to disk. /WRITEBEHIND specifies that the information can be written to disk later. /NOWRITEBEHIND specifies write-through operation (that is, the information must be written to disk immediately).