Shoutbox

This extension was for MSN 6.x, it won't work for MSN 7.0, the task you are talking about, isn't even what BK's winamp extension was for, it was for displaying it in your Screen Name. If you want to display the Now Playing WinAmp song in your contact list then download this:

http://msnblog.stuffplug.com/wp-content/gen_msn.zip

It does exactly what you want; another program that does the same (and many other things) is the Mess-Patch:

Mess Patch