Copy or move your command prompt to your Halo CE directory. Or do the same with tool and its nessescary files. If it gives you an error when you try to move or copy the command prompt, try downloading it to your Halo CE directory from another person or search google for a download.
Look up the PowerToys Open Command Prompt Here from M$. It lets you right click on a folder and select "Open command prompt here". The path is already set to whatever folder you use it on .
Disclaimer:
If your running XP, cool... If not please disregaurd this post.