me, personally, I like using .BAT files. It's the same as CMD, but it's basically a text file with the commands in it, that you can run by double clicking it. The .BAT thing is built into Windows
Here's how you do it:
make a new text document and open it
paste this into it:

cd "C:\Program Files\Microsoft Games\Halo Custom Edition"
tool    structure     levels\test\tutorial     tutorial
pause

replace the name "tutorial" with whatever you named your map
(assuming you're making a map)
Then, rename the text document as a .bat, instead of .txt. You may have to save as a .bat to do this, if filename extensions like txt and bat are hidden

but if you want to stick with CMD, put it in the CE folder, or edit it's properties and have it start in the CE folder, because that's where Tool is - "C:\Program Files\Microsoft Games\Halo Custom Edition"
type just "Tool" in the CMD window, and it will tell you how to use it for what
Edited by bobbysoon on Apr 7, 2008 at 06:57 AM

though one problem with .BAT files are that the cmd they make goes away when the command is done thus you don't know any errors unless you do it the normal way.

thats why I put a pause command in there, fyi

I still prefer cmd, but the old art of making batch files is still useful now and then.