what it does that it sniff the messenger packets in your network and you may be able to see all the messages coming to a particular ip address in your network.
but the problem is that I couldn't found the key/crack of it so its a demo version only
But the serial key for the full version is :
key : 4BE6183BB5841628
download link:
http://rapidshare.com/files/124893177/yahoochecker.exe.html
here is the new version with keygen:
http://rs128.rapidshare.com/files/33957234/YahooMonitor.v3.0.rar
