Open regedit. ( Click Start --> Run and type regedit and hit ok).
Navigate to HKEY_CURRENT_USER\Software\Policies\Microsoft\
Right Click on Microsoft Folder and then New--> Key.
A new folder will be added. Named it as WindowsMediaPlayer.
Now Right Click in the right Panel and then New-->String Value.
Name this value as TitleBar.
Now double click on it and type any text you want to display.
Click ok and hit F5 to refresh the registry.