Windows 2003 does not have such thing as "DOS cmd".
You should talk just about command-line utility for doing so, that way you could use it in batch files, for example, and do other things. It has nothing to do with "DOS" or "DOS Prompt" which are not supported by Windows (thanks goodness!) since… ooh… really long time. Let's just forget it.
What you need is the cacls or icacks utility. Please see:
http://en.wikipedia.org/wiki/Cacls[
^],
http://technet.microsoft.com/en-us/library/cc753525%28v=ws.10%29.aspx[
^],
http://technet.microsoft.com/en-us/library/bb490872.aspx[
^].
That's all. All the rest you will find out by yourself after you read the documentation.
—SA