Yahoo Messeger no add's

Yahoo IM no longer uses 'YUrl', but uses 'View' instead. You going to click on each key inside of 'View' and edit the 'banner url' string to anything you want. I simply cleared mine out completely and it works flawlessly
Here is what you going to do:

Run regedit
Goto HKEY_CURRENT_USER -> Software -> Yahoo -> Pager -> View

Inside the 'View' key there are a several other keys. go through each one and edit the 'banner url' string to your liking. It even works if the string is left blank (this causes it to look as if ads were never even implemented)
Restart Yahoo! IM for the effect to take hold.