I don'ta care what you silly *nix kniggits say, the NT command line,
much like unicorns, is pretty kick ass.
C:Temp>for %y in (0467 0643 0671 0705 0830 0836) do for /f "tokens=4" %x in ('dir rateupdt.???????? /od ^| find /i "2004-12"') do find /i "%y" %x >> c: empcrap.txt