Are you really sure that the vmic command should be available on Windows 2000? From what I remember wmic was introduced with Windows XP / 2003.
Yes, as many webpages say, "WMI comes installed on all of Microsoft's modern operating systems (Windows 2000, Windows XP, Windows 2003, Windows Vista and Windows 20081). " http://www.poweradmin.com/help/enableWMI.aspx
In addition, I can't find wmi resources available for windows2k. Those downloads are Just for windows95/98.