I like the script, but I would love it when I can change the message displayed in the toast. I'm Dutch, so I like to translate my scripts too. It would be cool if you have a string declaration in the *.js file which is used by the *.dll, like:
code:
var c_strToastMessage = "has opened a conversation with you";
so people can translate it.
Anyway, great script, but you should note the users that it can result in fake notifies due to the protocol.