Shoutbox

if you already have a plugin for it, just run another instance of msn.

polygamy works in a way that you can have two or more instances of msn running at the same time (so you can be signed into two or more accounts at the same time)

Edit: just on a side note.. depending which plugin you are using...

if you are using stuffplug, you have to enable the polygamy option in the configuration pannel.