You can change the text that appears at the very top of the Yahoo! messenger window by editing the ‘ymsgr.ini‘ file which is usually located in the messenger folder.
Just follow these steps:
1. Open you yahoo messenger installation folder (default C:\Program Files\Yahoo!\Messenger).
2. Then search a file named “ymsgr“. Double click to open it. If it doesn’t open, then use notepad to open this file.
3. In this file just go to the end and paste the following code in a new line:
As you can guess, you can replace the word “Cool Wizard” with any text of your choice. You can have your own name being placed in yahoo messenger title bar.
Now open your yahoo messenger and see the change.
Note: Before trying this tricks make sure to close all instances (windows) of yahoo messenger.