Maybe the DOS command should have been ren DSC_****.nef DSC_0****.nef
Thinking way back to my DOS days..... hard to remember.
EDIT: But now I remember, 8 character name only! Can't do 9.
Personally, I use a terrific program called NameWiz, lets you rename files and folders, etc. Can even rename extensions. Very handy.
Not much help, but nope '* = one or more characters' so it wouldnt work. Easy to do in Unix, cant remember the details in DOS. Also, eight character limitation is long gone.