You can add as many outlook configs as you want. It's all in profile management and folders.
if this is all on the same domain, same Exchange server, then do the following....
close all outlook sessions, right click the icon on the desktop(select properties) or goto mail in control panel.
select email accounts, accept defaults on next screen and click next. under the default profile, select Change from the list and then more settings on the next screen. Under the advanced tab, you can add as many as you want as long as they are on the same exchange connection.
The others (as in HTTP or POP) are additional mail boxes done through the first screen. Select email accounts and then click add. You can add only one SMTP, but you can have as many others as you wish.... atleast I have not found a limit to it yet...
hope that helps.