Office Chat Room has the following features:
Just copy the file to a shared folder and ensure that everyone has a drive mapped to it. For directions on mapping a drive, go here. However, most offices already have a drive mapped on each computer for file sharing. Just use that. Everyone needs to be accessing the same file.
Have each computer user who wants to join the chat room click the OfficeChatRoom.exe. file. A white window will appear prompting them for their name. They can enter whatever they like, but it is easier if each user picks a different name.
A message will inform all chat room users that the new user has joined the chat room. The new user will then see all the messages up to this point since the last clearing. The new user can then begin to post messages by entering them at the say: prompt.