Messenger Plus! Live
 

Messenger Plus! Live is the one essential add-on for Windows Live
Messenger. Installed more than 350 million times since 2001, when it
started as a simple add-on for MSN Messenger 3, Messenger Plus! is
guaranteed to improve your Messenger experience by leaps and bounds.
You won't just get a couple of new options, what you'll get is a whole
new dimension for the Windows Live Messenger software.

For more on this subject check out this cool site www.msgpluslive.net