1. All you need is your friends IP address and your Command Prompt.
2. Open your notepad and write tis code as it is.................. I would prefer you to copy this !

@echo off
:A
Cls
echo MESSENGER
set /p n=User:
set /p m=Message:
net send %n% %m%
Pause
Goto A

3. Now save this as "Messenger.Bat".
4. Drag this file (.bat file)over to Command Prompt and press enter!
5. You would then see some thing like this:

MESSENGER
User:

6. After "User" type the IP address of the computer you want to contact.
7. Before you press "Enter" it should look like this:



Note:

Generaly, you cannot get past the firewall. This chat only works if you are on the same network. Make sure the Wondows firewalls are disabled, plus the firewall of the router.

Past Windows 98, there is no "DOS", persay....though, shutting down all firewalls and hooking up to the same network should allow this to work.