Are you Yahoo Messeger User ? Try new A-Patch allow you to remove advertisements display in Yahoo MEssenger also with A-patch you can also open several istances of the application at the same time.
and Also, actually didn’t patch Yahoo, A-patch add some registry entries which disable the ads and enable multi-messenger for Yahoo Messenger!
A-Patch for Yahoo! Messenger will remove Contact List advertisementand the Chat Room one. A-Patch for Yahoo Messenger does all that with a single click.