Hey guys you can change the yahoo messenger title bar... For this just find the folder messenger in the drive in which the messenger is installed.
Then search a file named "ymsgr".
In this file just go to the end and write the following code:
[APP TITLE]CAPTION=Red Devil (if u r own caption)
Here you can write any name in place of Red Devil... then see the fun.... You can have your own name being placed in yahoo messenger title bar.