Below is a list of links for each country supported by Yahoo!. From the list, select the ZIP file for your country and version and download it. Of course, you must sign out and close Yahoo! Messenger to perform the change. Once you have downloaded and un-zipped the file, follow these instructions:

1) Rename the original YahooMessenger.exe file to YM_original.exe

2) Copy the YPvvvvcc.exe file to the Messenger folder

3) Rename the YPvvvvcc.exe file in the Messenger folder to YahooMessenger.exe